Sage-Tips

What happens when idle air control is bad?

If the idle air control valve (IAC) fails completely; it may leave the vehicle, without a source of air to maintain a proper idle. This may result in the engine stalling while operating. And, in some cases, may result in an engine that will not idle at all; or stalls as soon as it is started.

What does an idle speed control actuator do?

The idle speed actuator is responsible for regulating the engine speed as part of the overall idle-speed control of the engine management system.

How much does it cost to replace the idle air control?

The replacement cost of an idle control valve is anywhere from $120 to $500. The cost of the parts alone will be between $70 and $400+, depending on the make and model of your vehicle.

Can a idle control valve be cleaned?

Cleaning an idle air-control valve can keep you from buying a new part, but only certain idle air-control valves can be cleaned. The idle air-control valve must have a spring-operated valve for cleaning to make it work.

How do you check the idle air control valve?

One of the easiest ways to test your idle air control valve is to simply look at it. Check to see if the valve stems have dirt on them or if they are burnt. Check the valve opening on the throttle body also to make sure that there is a solid contact between the valve and the stem.

What are the symptoms of a bad idle air control valve?

Common Problem. Because an IAC valve controls air going into the engine only when the throttle is shut or almost shut,these are the only two times you’re likely to

Classic Symptoms. Classic symptoms of a clogged IAC are a rough or unsteady idle,and stalling if the valve passage gets too clogged or the valve fails outright.

Less Common.

How to test idle air control valve?

Remove Idle Air Control Valve. The idle air control valve is located on the top rear of the engine.

Visually Inspect Valve. One of the easiest ways to test your idle air control valve is to simply look at it.

Use Voltmeter. Turn the valve over until you see the valve openings.

What does an air idle control motor do?

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.