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Old 06-01-2012, 08:22 PM   #5
roadsterred

Name: roadsterred
Title: United Newb
Status: Offline
Join Date: Jun 2012
Location: Honolulu, HI
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Your Ride: 1994 540i
After replacing two O2 sensors, sparkplugs, fuel pressure regulator, and a coil pack on my 1994 540i to cure a rough idle and black exhaust smoke, I finally learned about an oil separator assembly located on the back of the engine's intake manifold. Replacing the assembly cured the problem.
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