A bad idle control valve can cause a multitude of issues with your car. Check out the Drive’s Garage Guide to identify the signs of a bad idle air control valve.

Modern vehicles use an idle air control (IAC) valve to regulate idle speed. Most IACs are an electric solenoid/pintle valve, which allows a metered quantity of air to sneak around the closed throttle.

Cleaning the Idle Air Control Valve. Locate the idle air control valve. It is usually found on the intake manifold and attached to the throttle body. Before beginning the process, make sure the ...

It’s also possible your idle air control motor is going bad. The idle air controller is simply a computer-controlled motor that controls idle.