91 750IL Running issue's - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 12-29-2009, 08:02 PM
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Angry 91 750IL Running issue's

Desperate need help.

My 750 won't stay running, Car starts then die's. Can do this over and over again. So far I have checked fuel pumps, fuel pressure, Spark, I have constant voltage to coils and bypassed both fusable links. I have also installed new crank sensors, fuel filters, O2 sensors, caps, rotors, plugs and wires. Any suggestion would be appreciated.
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#2 (permalink) Old 12-29-2009, 11:22 PM
OMFG another one!?
 
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How are the fuel filter(s)?

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#3 (permalink) Old 12-30-2009, 04:05 AM
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Does it still die if you rev it ??

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#4 (permalink) Old 12-30-2009, 12:36 PM
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As stated in the post, fuel filters are new with flow direction verified. You can start to rev it before it dies but not much. Coils do not lose power.
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#5 (permalink) Old 12-31-2009, 07:42 AM
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Sounds like you have a vacuum leak somewhere, although as its a V12 it will actually run on bank.....you say youve changed the crankshaft sensors do you mean camshaft sensors?

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#6 (permalink) Old 12-31-2009, 11:10 AM
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Both, The cam sensors are part of the 2 plug wire assemblies & the crank sensors are mounted behind the lower crank pulley.
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