E30 m50 helps - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 02-22-2012, 04:55 PM
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E30 m50 helps

Ok I know everyones tired of hearing about these. Sorry. I've got a 90 325i. Just dropped in for an m50 out of a 92 325. Got everything hooked up. No start. When pulled off the fuel lines and turned the block over no fuel. Pump doesn't register. I pulled off the the crank sensor. Its still good. Dme and fp relay is working correctly. When I try and jump terminals at the fp relay still no fuel. The fuel pump worked 3 days ago with the m20 in it. No blown fuses. Im just confused at this point.

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#2 (permalink) Old 02-22-2012, 09:51 PM
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Sounds like their is no power getting to the fuel pump. Is everything hooked up okay?


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#3 (permalink) Old 02-22-2012, 09:56 PM
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Funny you should mention that. I checked the continuity of the 2 black wires on the passenger of the m50 harness. Well long story short the big one is a ground and the smaller one Is constant power on the power post. Friggin fired up after 3 turns

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#4 (permalink) Old 02-22-2012, 10:02 PM
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The simplest things can bring the biggest headaches...


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#5 (permalink) Old 02-23-2012, 10:02 PM
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Boy, Vader...you can say that again! Every problem I've run into with my 325 has been me over-thinking the situation. I'm grateful for a lot of things, mostly the BMW tech's and my Bentley manual.
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