Hopefully, someone has had this one;
2nd day in a row, I exit the interstate (high speed) portion of my commute and enter surface streets. After the first couple of lights sitting, sitting, then going, when I approach the third or fourth stop, the engine revs when I push in the clutch. While I'm at the light stopped, it revs to ~3K rpm, drops to idle, revs to ~3K rpm, drops to idle, etc... The frequency of the revving is about every 2 seconds, up and down, up and down...It continues until I turn off the ignition. Then I restart the car and it runs normally.
WTF? Anyone, Bueler?

 

ISV Valve? Mebbe it needs cleaning...

 

Vacuum leak.

 

Right foot pushing gas pedal perhaps?

 

Thanks for the replies (even the smartass, which I can appreciate.) I had never heard of an ISV until the above post. Did a search and viola!!!!
I just cleaned it really well. It was coked up and seemed to stick a little when I removed it. I'll post a follow up in a few days with the verdict.

 

Just a follow up. Problem seems to be solved! ISV was apparently the issue. Thanks Rennlist!!!