I took the TB off Saturday and reinstalled it. It looked to me that it had a pretty good seal, and I am pretty sure it got another good seal when I replaced it. Ran good all day Saturday. Then, Sunday it did the revving thing again... really annoying. I revved the engine up to about 4k and it took about 30 seconds to slowly float down, then it sat right around 1500 RPM until I turned the engine off. Then started again, it was normal. I really don't thing the TB is getting stuck, as it moves very smoothly, and snaps back shut by itself when manually opened. I thought it could be the MAF sensor, but would that not give light on the dash? Then again, it ran completely fine today.