An idle air control valve, also called an idle air sensor control , is an electrically operated valve that controls the amount of air that bypasses the throttle plate in cars with a system [source: ]. 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: ]. Here we will look at how to clean the idle air control valve.
An idle air control valve is, in a very real way, the predecessor to the drive-by-wire throttle systems commonly employed today. It performs much the same function as any electronic throttle: to control the amount of air going into the engine so the computer can match it with the right amount of fuel. The only difference between these two systems is that an IAC is smaller and only works at idle.
The AAC and FICD are both solenoids that help make up the Idle Air Control Valve (IACV). The IACV also contains an adjustment screw for setting the base idle. The AAC housing receives air from the pipe connecting to the driver's side accordion pipe, and/or from the balance tube, through the air regulator.
Idle Air Control Valve by Hitachi®. With Gasket. This idle control valve will allow your engine to idle smoothly, adjusting the idle speed when you are driving. Designed utilizing advanced technologies and quality materials, it will ensure reliable and durable performance.