What is it and how do you clean it? I saw this as a cure for a rogh idle in another thread..

 

IAC = Idle Air Control (motor). It controls, acording to computer commands, the Idle speed. As loads increase on the engine at idle, the computer opens the IAC to keep the idle speed at the constant programmed speed. As loads decrease, the computer commands the IAC to close until the programmed speed is obtained. Rough idle caused by the IAC, I'm not sure, unless it doesn't work all together.

 

Thanks for the info