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The rpm is not stable.
2006 Mercedes-Benz ML350 4MATIC

The rpm is not stable.

(2006 Mercedes-Benz ML350)
Rpm goes up & down ,does it have to do whith a sensor?
2 answers & 0 comments
Popular Answer
on September 09, 2013
could be your iac valve or a vacuum leak check your vacuum lines for cracks
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on September 09, 2013
could be your iac valve or a vacuum leak check your vacuum lines for cracks
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of Overbys Inc on September 09, 2013
You did not say whether there is or is not a check engine light or any "pending" codes. This is very important info that would be helpful. After that, my next suggestion would be to perform a smoke test to identify the source of a vacuum leak.
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