Follow the black tube from your air filter housing to the metal air intake manifold on top of the engine. You will find it bolted on there. It should be shaped like a 3 to 4 inch long cylinder held on by at least 2 screws, and will have an electriacl connector on it. Go to advanceautoparts.com, or autozone.com, type in the yr make model and look up the part and they will have a decent picture of it there.
The idle air control valve on a Volvo S80 is located on the intake manifold. The valve controls the rate at which the engine holds an idle.
The idle air control valve controls the neutral idle of the 2001 Honda Accord. A faulty idle control valve leads to an erratic idle. To replace it first locate the valve on the intake manifold. Unplug the unit and remove the three bolts holding it to the manifold.
On the throttle body
There isn't one. Only on a 2004.
A bad IAC (Idle air control valve) or a vacuum leak or both.
On idle speed control actuator is located on the front of the air intake plenum
Some later models, 2001 onwards, don't have an idle control valve. The function is designed into the Electronic Throttle.
Open the hood of the car and find the idle air control valve. The valve is located on the Gran Marquis' throttle body. The idle air control is a cylinder with a wire connector plugged into it. If needed, refer to your repair manual for an exact diagram. Read more: How to Clean the Idle Air Control Valve in a 2001 Grand Marquis | eHow.com http://www.ehow.com/how_7649344_clean-valve-2001-grand-marquis.html#ixzz1eqCpBmRx
Attached to the intake manifold
The idle speed on a 2001 Honda Civic is adjusted through the idle air control valve. The valve is located behind the intake manifold. Open the cover using a screwdriver and tighten the valve to lower the idle.
that would be on the top of the engine under the TBI cover on the right side- to the front section of the TBI. near the flux capacitor.)
Directly below the throttle body.