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Re: M5 S38 3.8 poor idling when cold (archive)
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Posted by Rod... on October 07, 2001 at 11:18:33:

In Reply to: M5 S38 3.8 poor idling when cold posted by Niki on October 06, 2001 at 16:46:06:


My M5 3.8 idles poor until it reaches 70 degree Celsius.
We checked the ignition coils, valve play, idle control valves and the injectors.
What else can we check ?

Niki


Crank speed/reference pick-up
Leak-down or compression.
Spark plugs.
Vacuum leak at throttle body(check vacuum hoses and port caps).
False air leak ahead of throttle bodies.




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