BenzWorld Junior Member
Date registered: Mar 2011
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1991 190E 2.6 high/rough idle
1991 190E 2.6 5speed high rough idle. Hot or Cold it idles around 1200-1400 rpms and the car shakes like it's running on 5 cylinders. When I give it gas it smooths out.
When I'm driving it's ok, but I can push in the clutch and the rpms drops to 1200-1400( it won't go lower) it shakes again. I check the fuze on the OVP and that looked OK. I removed the ICV and soaked it in WD40 overnight.
I just put it back in and no change, still 1200-1400 and rough idle. I then pulled the connector off the ICV and the idle dropped to 700-800 rpms where it should be but still shook. Any ideas? I thought I saw a comment about a 3 wire coolant sensor? Thanks for your help