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had my car out last saturday and it ran just find then all of a sudden sunday night it started ideling high as hell without touching the gas it would shift out of first from how high the idel is. driving through town without touching the gas i would run 35 and have to hold the brake down to go slower. ive been trying to figure it out just need some places you guys think i should look at or replace thanks
Can someone tell me what IAC motors are? Sorry for such a basic question but I haven't worked on cars since the mid 80s so I'm rusty.
a simple explanation from the sources listed....
An idle air control valve, also called an idle air sensor control motor, is an electrically operated valve that controls the amount of air that bypasses the throttle plate in cars with a fuel injection system [source: Autozone]. This causes the idling speed of the engine to change as needed. The computer in the car that governs this function receives information from the air sensor and determines the amount of air that the idle air valve allows to pass through it and bypass the throttle plate. A defect in the idle air control can cause poor idling or even stalling of the engine. A coating of carbon may accumulate in the idle air control, and cause malfunctioning. It must, therefore, be cleaned at regular intervals. It's advisable to clean the idle air sensor control motor even if there are no problems evident, in order to prevent dirt from caking up [source: 2Carpros].