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Old 06-03-2013, 07:58 PM   #1
captain E34
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Join Date: Feb 2012
Location: Ottawa
Posts: 860
M50b20 nv 6 pin maf conversion help :(

hey guys, im in the middle of swapping out my tiny 2.75 6 pin maf in my 520 for a 3.5 4 pin maf from a 540,

I started with wiring up the wires the same way as the 540 but obviously having the 6 pin (which only has 5 pins being used) I have a left over wire,

I have 12 v power and the main ground hooked up but now im left with three wires on the dme side and 2 on the maf side....

is this combination not compatible at all or do I need to do some wire running to the dme?
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1987 BMW 535i (Sold)
1988 BMW 535i (Turbo Build)
1990 BMW 520i (Turbo Build)
1991 BMW 520i (Beater)
1991 BMW 535i (Burnout Beast)
1994 BMW 540i (Scrap)
2009 BMW 335i (Daily Driver)
and more....

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