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Old 11-13-2012, 11:40 AM   #2
Registered User
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 19,539
My Ride: 330CiC, M5, X5
Not likely the MAF sensor, O2 sensors or any other sensors.

Deviation rich means you are running LEAN.

You likely have a vacuum leak.

Check the lower CCV oil return hose, fuel pressure regulator vacuum line at the filter and see the first 2 links below in my signature.
Solve your misfires, lean codes, rough idle -

Fuel pump failures -

Temp Info -

Hidden OBC Menu - Check Voltage, Temp, Fuel Level -

E46/E39 GM5 Door Lock Info -

Lower hose temp switch O-ring - BMW #13621743299
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