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Car Forum / Mercedes-Benz Cars / April 200788 300TE, how to adjust idle speed?
RPM when engine cold = 1800 RPM when engine warm = 1100 in neutral, 800 when in D thanks in advance Computer controlled. NO adjustments possible. Either you have a failure in your idle speed control circuit or a big vacuum leak. I would look for the vacuum leak FIRST. False air will raise the idle. > RPM when engine cold = 1800 > RPM when engine warm = 1100 in neutral, 800 when in D > > thanks in advance Thanks Karl, the check engine light is on as well, what is the procedure to read the codes from the LED near the battery? > Computer controlled. NO adjustments possible. > [quoted text clipped - 7 lines] >> >> thanks in advance If engine light is on too. I would check three things... 1. OVP relay fuse... 2. Vacuum leak... check all vacuum hoses and make sure connection is tight. 3. Bad idle speed controller computer. Common too but in your situation, I would check other things first. |
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