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Message: <blockquote data-quote="joemomma" data-source="post: 1507053" data-attributes="member: 25929">So, this morning leaving for work, fire the car up and it's idling what I would call "rough", almost like it has way too big of a cam.  No miss, just running rough like an old carb setup that isn't warmed up yet.  Give it a light rev and it clears up some, so I proceed to back out of the driveway.  Still running rough, I stop at the upstairs garage and pop the hood, thinking maybe #4 plug wire is off again causing it to miss.  Nope, everything is good and tight.  Close the hood and drive on in.  It is running fine, by the way.  No loss of power or anything of that sort.  The only issue I notice is the idle is hanging and it's idling higher than normal.  Normal on this car is 900 or so, and it's hanging around 1200-1300 RPM when at a stop light.  Hop in at lunch, and it's idling rough again with the continued high idle and hanging revs.  After lunch the rough idle is gone, but the revs are still hanging.  I have a suspicion that when I leave after work it's going to idle rough, and still have high idle/hanging revs.Am I looking at a vacuum leak here?  Car seems to run fine otherwise.</blockquote>