What is your question?
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What is your question?
My tahoe idles rough when ac is on.any ideas what it could b.?
What makes this problem better or worse?
Every time i turn ac on it idles rough.real rough
How long has your 2009 Chevrolet Tahoe had this problem?
2 weeks
1 Reply
Possible idle speed control is not maintaining correct engine rpms when a/c compressor engages. Low engine idle rpms while under load of a/c compressor will result in rough idle. Of course *hands-on* testing will be required.
Observe tachometer (rpms) when a/c is turned on to see if rpms drop and do not increase until a/c is turned back off.. Idle rpms should ‘remain’ relatively the same regardless.