Un-metered air leaks may occur in the following areas causing the above situation:
Intake manifold gaskets may be leaking.
Plug cap(s) and the vacuum hose for the fuel pressure regulator on the rear intake manifold cover (crankcase ventilation valve) may be torn or missing.
I would let a BMW Dealer look at it and confirm that this is the problem with your vehicle.
Thursday, January 29th, 2009 AT 2:42 AM