Manual Idle Air Control Valve

Commonly called an idle air control iac valve or idle speed control isc valve this device is used on many cable operated throttle bodies to regulate the engine idle speed.

Manual idle air control valve. Your rpms will drop way down the car may feel like it s about to stall. A manual air control valve from grainger can help manage and direct air pressure in a multitude of pneumatic applications. An iac valve that sticks in the closed position will create an idle speed that s too low. Measure the resistance between the iac valve terminals using an ohmmeter.

Disconnect the iac valve connector. Some iacs are stepper motors while others are solenoids. Select a light duty directional control valve to help power devices such as cylinders slides and gates. See idle air control system inspection if not as specified perform the further inspection for the iac valve.

The idle air control valve also known as the idle speed control valve regulates the idle speed of your engine. The valve is a major management component of the engine which will either decrease or increase the number of revolutions per minute depending on what the current operating conditions call for. If necessary adjust idle by turning both throttle plate idle screws the same amount to achieve 750 rpm. Choose a hand lever pneumatic valve for packaging material handling and air motor applications.

90 degree copper pipe at exit of idle control valve red arrow air introduced at mid point of balance tube yellow arrow. Disconnect the negative battery cable. Check to see if your idle control valve is functioning properly before attempting to replace it. Sometimes parts go bad which results in your car idling strangely or stalling.

This is controlled by the engine s computer. In the not so distant past nearly all cars had an idle air control valve iac. Carry out the idle air control inspection. Symptoms of a failing idle air control valve.

Manual warm up idle speed control project completed. It s a pretty simple device that controls idle speed by managing the amount of air bypassing the throttle plate. These days most new cars have electronic throttle control etc eliminating the need for. This process is completed by regulating airflow through a bypass circuit around the throttle plate to increase or decrease idle speed.

Idle valve blue arrow.