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904 659 506 1000cc
bad sparkplug-connections or insufficient dwell or misfire)
Plug in the engine wiring harness to the new ECU
Made with NEW connectors
GM/Bosch 60-2
VEMS Audi 5 Cylinder ECU wideband 904 659 506 1000ccVEMS v3. x ECU with Motronic55 connector and internal MAP sensor. The Audi AAN (same pinout as the ABY ADU) and the Audi 3B were the first applications (note that 3B has different pinout with only 1 ignition channel). These use special "auditrigger" 3 sensor trigger system with the 135 tooth flywheel teeth VR, crankhome VR and cam HALL sensor. The audi factory MAT (manifold air temperature) sensor is PTC type, so 430 Ohm pullup resistor is used for
