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Originally Posted by maxwedge
Also possible, if I remember correctly, there is a tsb on this for a software update in the pcm, if you cannot correct by cleaning the TB then check with a dealer on this.
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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?