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i think your problem may be down to the fact that you have used the basis of a 535i to do your conversion. the b9 used the 528i as its base and so it is quite possible that there is a different wiring loom.

i have checked an article from september 1984 and it quite clearly states that the 528i engine was dropped out and the alpina unit dropped in. then the jetronic ecu was simply swopped over for the motronic alpina ecu.

my suggestion is that you talk to fritz bitz in taunton, as he has recently put a b9 engine into his 6 series and is very well up on e28 issues. i am sure he can help you. you will find him advertising in all the usual bmw magazines as i dont have his number to hand.


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