The 07K Wiki - User contributions [en]

Standalone Management

2026-04-17T04:06:41Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

==== Throttle body Pinout ====
'''Pin 1: TPS 1'''

'''Pin 2: TPS 2'''

'''Pin 3: Motor 1 - Brown'''

'''Pin 4: Output 5V'''

'''Pin 5: Motor 2 - Lilas'''

'''Pin 6: Ground'''

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts they are as follows.

==== Accelerator Pedal Pinout ====
'''Pin''' <ref>https://files.fueltech.net/manuals/Throttle%20Guide.pdf</ref>'''1: 5V'''

'''Pin 2: 5V'''

'''Pin 3: Ground'''

'''Pin 4: Output 1'''

'''Pin 5: Ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Ignition options / Wheel Decoder ===
[[File:MS3x Tunerstudio ignition - wheel decoder options page.jpg|thumb|TunerStudio ignition/wheel decoder options page for a cam and crank sensor setup.]]

=== Coil on plug(COP) ===
Wiring Diagram on pictured on the right.[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]
==== VW/Audi COP issue ====
The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427. [[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]][[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram pictured on the right.
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T04:06:02Z

Vindez77: /* Throttle body Pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

==== Throttle body Pinout ====
'''Pin 1: TPS 1'''

'''Pin 2: TPS 2'''

'''Pin 3: Motor 1 - Brown'''

'''Pin 4: Output 5V'''

'''Pin 5: Motor 2 - Lilas'''

'''Pin 6: Ground'''

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin''' <ref>https://files.fueltech.net/manuals/Throttle%20Guide.pdf</ref>'''1: 5V'''

'''Pin 2: 5V'''

'''Pin 3: Ground'''

'''Pin 4: Output 1'''

'''Pin 5: Ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Ignition options / Wheel Decoder ===
[[File:MS3x Tunerstudio ignition - wheel decoder options page.jpg|thumb|TunerStudio ignition/wheel decoder options page for a cam and crank sensor setup.]]

=== Coil on plug(COP) ===
Wiring Diagram on pictured on the right.[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]
==== VW/Audi COP issue ====
The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427. [[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]][[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram pictured on the right.
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T04:04:24Z

Vindez77: /* Accelerator Pedal Pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

==== Throttle body Pinout ====
Pin 1: TPS 1

Pin 2: TPS 2

Pin 3: Motor 1 - Brown

Pin 4: Output 5V

Pin 5: Motor 2 - Lilas

Pin 6: Ground

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin''' <ref>https://files.fueltech.net/manuals/Throttle%20Guide.pdf</ref>'''1: +5'''

'''Pin 2: +5'''

'''Pin 3: Ground'''

'''Pin 4: Output 1'''

'''Pin 5: Ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Ignition options / Wheel Decoder ===
[[File:MS3x Tunerstudio ignition - wheel decoder options page.jpg|thumb|TunerStudio ignition/wheel decoder options page for a cam and crank sensor setup.]]

=== Coil on plug(COP) ===
Wiring Diagram on pictured on the right.[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]
==== VW/Audi COP issue ====
The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427. [[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]][[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram pictured on the right.
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T04:02:53Z

Vindez77: /* Accelerator Pedal Pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

==== Throttle body Pinout ====
Pin 1: TPS 1

Pin 2: TPS 2

Pin 3: Motor 1 - Brown

Pin 4: Output 5V

Pin 5: Motor 2 - Lilas

Pin 6: Ground

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin 1: +5'''

'''Pin 2: +5'''

'''Pin 3: Ground'''

'''Pin 4: Output 1'''

'''Pin 5: Ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Ignition options / Wheel Decoder ===
[[File:MS3x Tunerstudio ignition - wheel decoder options page.jpg|thumb|TunerStudio ignition/wheel decoder options page for a cam and crank sensor setup.]]

=== Coil on plug(COP) ===
Wiring Diagram on pictured on the right.[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]
==== VW/Audi COP issue ====
The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427. [[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]][[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram pictured on the right.
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T04:02:44Z

Vindez77: /* Throttle body Pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

==== Throttle body Pinout ====
Pin 1: TPS 1

Pin 2: TPS 2

Pin 3: Motor 1 - Brown

Pin 4: Output 5V

Pin 5: Motor 2 - Lilas

Pin 6: Ground

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin 1: +5'''

'''Pin 2: +5'''

'''Pin 3: ground'''

'''Pin 4: Output 1'''

'''Pin 5: ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Ignition options / Wheel Decoder ===
[[File:MS3x Tunerstudio ignition - wheel decoder options page.jpg|thumb|TunerStudio ignition/wheel decoder options page for a cam and crank sensor setup.]]

=== Coil on plug(COP) ===
Wiring Diagram on pictured on the right.[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]
==== VW/Audi COP issue ====
The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427. [[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]][[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram pictured on the right.
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T04:00:59Z

Vindez77: /* Throttle body */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

==== Throttle body Pinout ====

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin 1: +5'''

'''Pin 2: +5'''

'''Pin 3: ground'''

'''Pin 4: Output 1'''

'''Pin 5: ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Ignition options / Wheel Decoder ===
[[File:MS3x Tunerstudio ignition - wheel decoder options page.jpg|thumb|TunerStudio ignition/wheel decoder options page for a cam and crank sensor setup.]]

=== Coil on plug(COP) ===
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

Wiring Diagram on pictured on the right.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]
==== VW/Audi COP issue ====
The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427. [[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram pictured on the right.
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:48:13Z

Vindez77: /* Accelerator Pedal Pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin 1: +5'''

'''Pin 2: +5'''

'''Pin 3: ground'''

'''Pin 4: Output 1'''

'''Pin 5: ground'''

'''Pin 6: Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:44:07Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

==== Accelerator Pedal Pinout ====
'''Pin 1 +5'''

'''Pin 2 +5'''

'''Pin 3 ground'''

'''Pin 4 Output 1'''

'''Pin 5 ground'''

'''Pin 6 Output 2'''

If you want to bypass the safety of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:43:45Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows. If you want to bypass the saftey of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

==== Accelerator Pedal Pinout ====
'''Pin 1 +5'''

'''Pin 2 +5'''

'''Pin 3 ground'''

'''Pin 4 Output 1'''

'''Pin 5 ground'''

'''Pin 6 Output 2'''

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:41:29Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows. If you want to bypass the saftey of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

'''Pin 1 +5'''

'''Pin 2 +5'''

'''Pin 3 ground'''

'''Pin 4 Output 1'''

'''Pin 5 ground'''

'''Pin 6 Output 2'''

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:09:12Z

Vindez77: /* Throttle body */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably wire the controler via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased like the ldperformance DBW or DBWX2.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows. If you want to bypass the saftey of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

Pin 1 and 2 are +5

Pin 3 is ground

Pin 4 is Output 1

Pin 5 is ground

Pin 6 is Output 2

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:07:53Z

Vindez77: /* Throttle body */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, in order to control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows. If you want to bypass the saftey of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

Pin 1 and 2 are +5

Pin 3 is ground

Pin 4 is Output 1

Pin 5 is ground

Pin 6 is Output 2

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:07:30Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows. If you want to bypass the saftey of having multiple 5v inputs, wire both the 5v together, this can also be done with the grounds.

Pin 1 and 2 are +5

Pin 3 is ground

Pin 4 is Output 1

Pin 5 is ground

Pin 6 is Output 2

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:05:50Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin layouts as follows.

Pin 1 and 2 are +5

Pin 3 is ground

Pin 4 is Output 1

Pin 5 is ground

Pin 6 is Output 2

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:05:12Z

Vindez77: /* Accelerator Pedal */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===
I have only messed with mk5 and mk7 pedals and they had identical pin lay out which are as follows.

Pin 1 and 2 are +5

Pin 3 is ground

Pin 4 is Output 1

Pin 5 is ground

Pin 6 is Output 2

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:04:01Z

Vindez77: /* VVT */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

=== VVT ===

=== Accelerator Pedal ===

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T03:01:42Z

Vindez77: /* General Setup */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

=== VVT ===

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T02:59:49Z

Vindez77: /* Mega squirt 3X */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===
The 07k uses a drive by wire throttle body, control the thorttle body, you need a 3rd party throttle controller called DBW controller. Preferably these wire via can bus to the ecu to avoid extra wiring. A DBW control can be made by Arduino or purchased.

=== Map sensor ===

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T02:54:53Z

Vindez77: /* Crank sensor pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal. This is done by wiring a resistor between 5v and sensor output.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===

=== Map sensor ===

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />

Standalone Management

2026-04-17T02:53:16Z

Vindez77: /* Crank sensor pinout */

== General Setup ==

=== Crank sensor ===
[[File:07k crank sensor.jpg|thumb|07k crank sensor with plug]]
The 07K engine uses a Hall Effect crank position sensor. This is synced with the cam sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Crank sensor pinout ====
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''
[[File:07k vs 1.8 crank sens.png|thumb|07k vs 1.8t crank sensor comparison ]]
For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

For Mega Squirt, a pull up resistor is needed for the ecu to recognize the signal.

===== Incorrect wiring diagrams =====
This sensor is easily confused with the similar-looking 1.8t Variable-Reluctance(VR). Both are three-wire sensors, The 07k uses two small hex bolts and the 1.8t uses a single bolt. In the [[Wiring Diagrams|wiring diagrams]] of both the 1.8t and the B series of engines (BGP, BGQ, BPS) have the same sensor diagram but use different sensors. Per the diagram, both show the 3-wire VR sensor with VR+, VR-, and shield ground, this is incorrect for the 07k. The C series of engines (CBTA, etc.) does not display a diagram for the sensor.

=== Cam Sensor ===
The 07k uses a single Hall effect sensor on the intake cam. This is synced with the crank sensor for Dual Wheel Missing Tooth engine operation and VVT.

==== Cam sensor pinout ====
[[File:07k Cam sensor.jpg|thumb|07k Cam sensor]]
On the rear of the sensor plug the wires are numbered 1 through 3.

'''Pin 1: 5v.'''

'''Pin 2: Sensor output.'''

'''Pin 3: Sensor ground.'''

For best results this sensor should shielded and kept away from sources of EMI like the starter, high-current wires, and any noise source.

=== Coil On Plug(COP) ===

=== Coolant sensor ===

==== 2 Wire ====

==== 3 Wire ====

=== Knock Sensor(s) ===

=== Throttle body ===

=== Map sensor ===

== Mega squirt 3X ==
<nowiki>**</nowiki>Please note that this is a work in progress, tune and wire at your own risk**

=== Coil on plug(COP) ===

==== VW/Audi COP issue ====
[[File:COP wiring diagram.png|thumb|Wiring diagram for COP<ref>http://www.extraefi.co.uk/</ref>]]

The MegaSquirt3X cannot drive the VW/Audi coils directly. This is due to the SNx4AHCT541 Integrated circuit is limited by the resistance of the trigger of the coil being lower than 1k ohm. The resistance of the standard COPs is ~440 ohm. This causes the coils to pull more current than SNx4AHCT541 can handle and leads to misfires and potential EMI issues in the MS3X leading to RPM sync loss.

==== VW/Audi COP fix ====
The fix to this issue is using three TC4427 Integrated circuits that can handle the required higher current (the number of ICs can be scaled for more cylinders) and one 15 ohm resistor on the output of each TC4427.

[[File:Tc4427 wiring.jpg|thumb|MS3X ignition output modification circuit<ref>https://www.msextra.com/forums/viewtopic.php?t=75997</ref>]]

[[File:Megasquirt VAG COP driver.png|thumb|Megasquirt VAG COP driver on a PCB<ref>https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing</ref>]]

=== Drive by cable ===

==== Using a VR6 Throttle body ====
Wiring diagram
[[File:VR6 OBD2 Throttle body .png|thumb|Male 8 pin plug going into to throttle body]]

[[File:2 wire pwm MS3X circuit .png|thumb|MS3X 2 wire PWM idle circuit <ref>https://www.msextra.com/manuals/ms3manuals/</ref>]]

== Helpful links ==

====== Audi R8 VAG coils with MS3X ======
https://www.msextra.com/forums/viewtopic.php?t=77101

====== MS3X 1.8T no crank signal ======
https://www.msextra.com/forums/viewtopic.php?t=50407

====== Switching to VAG coil on plug ======
https://www.msextra.com/forums/viewtopic.php?t=75997

====== Audi R8 Coils not working - what did I do wrong? ======
https://www.miataturbo.net/megasquirt-18/audi-r8-coils-not-working-what-did-i-do-wrong-107034/

====== Megasquirt VAG COP driver ======
https://shop.fullest.fi/product/6894/vag-cop-driver-8-channel-without-casing
<references />