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Old 06-17-2011, 04:03 PM   #3
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Join Date: Mar 2006
Location: Columbia, Maryland
Posts: 1,873
My Ride: 2000 BMW 3XXi ZSP
I would suggest you replace the O2 sensors pre-cat which is the easy possibility but it sounds more like your Crankcase Vent Valves (CVV) hoses are probably cracked and need replacement. I had some of the same symptoms and it turned out to be my CVV hoses. Just my two and a half cents worth...
V/R Zachary Pullins Sr.
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2006 E90 325Xi & 2000 E46 3XXi
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Last edited by Zchild; 06-17-2011 at 04:33 PM. Reason: Additional information
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