Accepted Answer

hi i can help you i have seen this before it is often a vacum leak here is a case for you to see and check some of these possible causes let me know what you find

Symptom:	View Full Image	Uneven idle stalls.
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System:	View Full Image	Emissions/PCM/Fuel
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Codes:	View Full Image	N/A
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Problem:	View Full Image	Intake air leaks, either from the crankcase vent valve cover on the rear of the intake manifold plenum or from leaking valve cover gaskets.
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Test & Fix:	View Full Image	Check for intake air leaks at the crankcase vent valve cover on the rear of the intake manifold plenum and from leaking valve cover gaskets, usually at the rear of the cylinder head. Check the crankcase vent valve for correct installation of the vacuum plug. Check the vacuum line to the fuel pressure regulator. If either is loose or missing, replace the vent valve and plug. If they are not missing, check for intake leaks at the gasket between the valve and the intake plenum. In addition to the above problems, on vehicles with M60 engines, there is a possibility of uneven running due to one or more engine mechanical factors: incorrect piston ring end gaps and/or excessive cylinder wall wear. If intake leaks are not found, and normal tuning items such as spark plugs and coils are in good condition, compression and cylinder leakage tests should be performed to determine if an engine teardown is in order. NOTE: BMW has been extending the warranties on M60 engines beyond the normal warranty period. In some cases up to 100,000 miles. If the signs point to excessive engine wear, it might be advisable to contact a BMW dealer for warranty eligibility. A related document, BMW TSB 11 05 98, is available. Additional Information

Edited by SEAN on 10/22/2009 at 8:25 PM

Expert:	SEAN
Pos. Feedback:	100.0 %
Accepts:
Answered:	10/22/2009

ASE Certified Technician

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