Help me diagnose bad idle
Thread Starter
MBWorld Fanatic!
Joined: Dec 2007
Posts: 1,100
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From: Rochester, MN
sounds like airplane
Help me diagnose bad idle
My car will not idle well. The symptoms are very similar to a vacuum leak, however there is no vacuum leak. What else might it be? The car drives well once it is not at idle and boosts (which definitely implies no vacuum leak).
What sensors are involved in maintaining idle?
thanks
What sensors are involved in maintaining idle?
thanks
MBWorld Fanatic!
Joined: Apr 2010
Posts: 4,437
Likes: 43
From: PDX
1999 C43, 2008 P30 E63, 2014 SQ5, 2024 Model Y Performance
Is it throwing any codes???
Here is a list of possible causes:
Here is a list of possible causes:
- Vacuum leak
- MAF
- O2 sensors (pre-cat)
- Air filter
- Idle Control Valve
- Camshaft position sensor (CPS)
- Bad coils
- Fuel filter.
- Valve cover gasket leak
- Blown head gasket
