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Old 01-21-2014, 12:36 PM   #7
captain E34
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Join Date: Feb 2012
Location: Ottawa
Posts: 893
Here are the pinouts side by side.

E28 Harness, MS3, MS3X.pdf

Harnesses.png

if anyone here has ever wired up ms3 to the stock harness would you tell me the thing you had to change?

I know I have to change my tps to a newer m30b35 or m50 tps as they use a signal throughout from closed to open instead of just wot or closed

as for the injector stuff, do I just wire the ms3 2x injector control 123 to the injector control, single wire, 123 on the stock harness? and the same for the injector control 456?
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1988 535i M30 (Turbo Build)
1990 520i Soon To Be S52 (Turbo Build)
1991 520i M50 (Beater)
1989 535i M30 (Beater)
1994 525it M50 (Beater)
2009 335i (Daily)
1997 M3 (Donor Car)
The Rest Is History...
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Last edited by captain E34; 01-21-2014 at 01:47 PM.
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