Ok, I have been searching for a few hours - seriously and I have had no luck. I have a 1991 318is that I swapped an m20 into. The c101 from the m20 has two extra pins in positions 2 & 10 on the c101 terminal (with a green and a blue wire) that the 318is fusebox wiring doesn't have (they are blank). The fuel pump does not appear to be working either- what have I overlooked or done wrong? I even poured over the Bentley manual with no luck, I know its probably something stupid- but for the life of me I am failing miserably!!!

Now I just found the installation manual for the Miller MAF, so I need to modify the ecu pin out slightly (which hopefully will help the car not run @ 3k RPM...) I'm starting to realize why everyone foo-foos the m42 to m20 swap! :drink:
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