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Old 06-03-2012, 11:36 AM
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BigBoy740il BigBoy740il is online now
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Location: Arizona
 
Join Date: Jan 2012
Posts: 270
Mein Auto: 1989/1991 E30; 2000 E38
You need to first start with the engine codes and check for vacuum leaks. I'm positive the fumes are from the engine running rich. What is your engine's idle speed (cold and warm). Check all air bellows and vacuum hoses for leaks or cracks. Check fuel pressure regulator, and engine vacuum readings. Check the condition of your gaskets..... Valve covers, valve cover half moons, oil fill cap, oil dip stick, oil pan. These engines are very sensitive and any additional unmetered air throws off the air fuel mixture.
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Last edited by BigBoy740il; 06-03-2012 at 11:58 AM.
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