i believe horseydug is correct. at WOT the IAC valve should be fully opened. at idle it should be almost closed. and while off, but the key in the ignition it should probably be open waiting for you to start the car. (how far i dont know, though i would assume it would be largely open until the idle comes down when it goes to the almost closed position). why do you think your IAC is bad? what symptoms are you having? if your symptom is a high idle, go to your car and pinch the rubber hose that connects to the IAC while the car is idling high. if your rpms drop down when you do that (almost stalling) then your IAC is sticking open.
