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Cleaned TB, now engine revs up and down!!
OK, OK, enough bickering about Cobalts and Bonnevilles.......I need some help (technical) here!
I cleaned my throttle body last night with Valvoline TB cleaner. Put everything back together properly, and drove over to my favorite park and back. Car drove as usual.
Until this morning. I fired the beast up and the idle speed was about 2,500!! Then as I drove away, I noticed that there is now a lag after letting off of the gas before the engine speed drops. And when the car is in neutral, the engine revs up and down between 1,500 and 3,000 by itself!!
Anyone have any advice? What did I break!!??
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