I have a 87' 327i with a 731 head. The engine runs good but it will not start cold with the AFM plugged in! I can unplug it and it fires right up. Usually, then I can plug the AFM back in and it will run a little rough but it smooths out pretty quickly. The car has a Motronic 1.3 swap and it has a chip in it but I am not sure what chip it is (installed by PO of stroker parts) I purchased the 1.3 setup from someone with an identical setup with only one difference. He ran a 325i downpipe and I still have an ETA one. My hypothesis is that it may be flooding on startup because it cranks and cranks with a few sputters. When I start and but AFM back the Idle rpm is quite low for a cold engine (~900).
Anyone know if the downpipe could be a cause of a rich running start or should I invest in a new chip for the ECU? Any other ideas? Bad AFM maybe? Thanks!
Anyone know if the downpipe could be a cause of a rich running start or should I invest in a new chip for the ECU? Any other ideas? Bad AFM maybe? Thanks!
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