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Originally Posted by KahneFan
Sometimes it revs really high as well. Once in a while (not very often) after I just started it, even if I just hopped out for a second (still warm), and then I put the truck in drive and begin to drive the engine sounds like it wants to fly out of the hood. I'll be honest, I've never looked at the RPM's at this point, so I couldn't tell you if it's a fan, or the actual motor. After 10 - 20 seconds of driving, it sounds normal again. My power is never effected, it just sounds very loud. Does this have anything to do with it idling down at stop lights as well?
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Reving really high sounds like the fan clutch.
Trying to die still sounds like the idle air control to me. Sorry, I am not at work so cant check the TSB on it though.