What is an IAC valve problem?

The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls.Click to see full answer. Also asked, how do you know if your idle air control valve is bad? Bad Idle Air Control Valve Symptoms 1) Intermittent Idle Speed. Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. 2) Check Engine Warning Light. 3) Rough Idling. 4) Engine Stalling. 5) Load Causes Stalling. Furthermore, what is idle control valve? An idle air control actuator or idle air control valve (IAC actuator/valve) is a device commonly used in fuel-injected vehicles to control the engine’s idling rotational speed (RPM). In carburetted vehicles a similar device known as an idle speed control actuator is used. Also, how do I reset my idle air control valve? Reset the IAC valve pintle position by performing the following: Depress the accelerator pedal slightly. Start the engine and run for 5 seconds. Turn the ignition switch to the OFF position for 10 seconds. Restart the engine and check for proper idle operation. How do you clean an IAC valve? How to Clean the Idle Air Sensor Control Motor Make sure the car engine is off and quite cool before you begin. Locate the idle air control valve under the hood. Unscrew the idle air control valve by removing the screws that hold it to the throttle body. Clean the valve by soaking it in gasoline. Drain off the gasoline.