ok heres the sitchiashun...... im in the interstate today and about to get off on my exit, so i put it in neutral and coast down the ramp to the stop light, and i realize my engine is revving by itself for some reason and holding steady at 4500.... So i sit there for a second all confused thinking i might have my foot on the gas and not realize it, but then i realize i dont.... so i give it a good rev, and it drops down to about 2500 and stays there till the light turns green and i can start moving. So i get to the next light and the idle goes back to the normal 6 or 8 hundred rpm or so.... I drove around the rest of the night and it didnt happen again. Anyone know what might have caused this or if its just a sign of something bad thats about to happen? I got 70k miles on it now. Im just wondering if maybe its time for a new timing belt or something? Someone please help im perplexed!