The engine recieves air through a fresh air system known as the air intake system.
Different cars use either a single air cleaner and plastic hose, bringing fresh air to the throttle body or some have different arrangements either factory or aftermarket made. The air filter sits in this just before the air enters the Throttle body, assuring fresh and filtered air is drawn in. All your cables that controls the idle speed are attached to the throttle body. It looks just like a smaller carburetor. The throttle position sensor is mounted on one side of the throttle body. The idle speed motor(IAC) or air idle control is also mounted on it. Just below the throttle blade. It moves in or out to give the engine a sort of a controlled vacuum leak, and the manifold absolute pressure sensor, senses the drop in vacuum, telling the computer to give the injector more gas. So both the TPS and the AIC are usually right on the throttle body, which houses the thrrottle blade. Just follow the accelerator cable and you will see it mounted right on the throttle body, near the TPS. It has 3 wires at least.
Clean it and clean the hole it came out of with carb. Cleaner and a small nylon brush.
I think that you may be hearing that loud screech coming from the alternator belt as you give it a load turning on accessories. Glad to help.
Thursday, October 15th, 2009 AT 12:28 AM