I started my car today and it idled really high. I figured it would go down but it didn't. I drove the car for a while and still idled high. And it also does this, when I'm in any gear and I get up to about 3-3500 rpms and let off the gas to slow down without breaking once the rpms drops just a bit then it drops again really far and changes the tone of the car. It runs fine except for the idle.
Replaced the IAC & that did the trick Thanks everyone.
Also found a way to test for this. Place a piece of tape over the two holes under the IAC, reinstall the IAC, start the engine. Mine would run, very low idle, & had to hit the gas to keep it running. It was not at all running at high idle, so I replaced the IAC w/ a new one, problem solved .