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== Audi S2 Coupe 2.2L 20vt --> 400+ bhp == I'm planning to convert my Motronic Audi S2 Coupe (ABY-engine) to the VEMS motronic55. I can use your help, that's for sure. ------------------------------------------------------ I have some problems with the Vems unit. My car doesn't start. Have swapped the VR-signal, checked everything. I first started on 1.1.63, on which the ECU was delivered. Had some exhaust bangs, but no running. Changed req_fuel, TDP etc. Updated to 1.1.70, still no runner. Updated to 1.1.27, still no runner. Borrowed a Vems unit from my mate, it came from a running ABY engine on 1.1.27, but no running engine. Checked the signal from the flywheelpinsensor, and the hall window with a oscilloscope, it was nice on time. Replaced or checked almost all grounding of the engine, coils etc. Also changed the VR-sensor for a brandnew one, but no running. Maybe need to check longer, just tried for 30 sec. after I changed the VR-sensor. Engine starts instant on motronic. Changed the custom remap in the Bosch ECU for a generic chipset and engine runs fine, so as far as I know, no strange things are done in the past by previous owner. Please help! What can I check more?
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