What is an IAC?
What is an IAC?
The idle air control (IAC) valve is located on the throttle body of fuel-injected engines, where it works with the vehicle’s ECU to electrically regulate airflow to the engine to ensure smooth idling.
Who is responsible for the idle air control valve?
The engine control unit is responsible for managing the idle air control valve. When this central computer receives information about the temperature and load of the engine, it uses this information to make the proper adjustments to the idle air control valve.
Can a bad idle air control cause vibration?
When the engine of your vehicle sounds off on idle, the idle air control valve may be faulty. In most cases, a bad valve will also produce a vibrating effect throughout the vehicle. If this is the case, you may need to have a professional check it as soon as possible.
Can a bad idle air control valve cause a backfire?
When the vehicle backfires, it could be another possible symptom of a bad idle air control valve. However, it is also consequential to know that it could be an indication of a completely different kind of issue.
What to do if your idle control motor is not working?
Connect the negative lead of a test light to the body of the car and press the test light into each of the four circuits on the GM idle control motor. The test light should flash or go from bright to dim through each circuit while the engine is running. If there is no flash, ECU is having problems instead of idle control motor.
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 to make sure that there is solid contact between the valve and the stem.
What is the function of the idle air control valve?
How an Idle Air Control Valve Works. The idle air control valve is a component of the internal combustion engine. The function of this valve is to manage the engine idle speed so that it stays within a normal RPM (revolutions per minute). For instance, whenever you stop or park your vehicle, the engine will continue running.
How do you reset your idle air control valve?
Try to clean out the passage way to the idle air control valve at the throttle body. Once the throttle body has been cleaned and the instructions have been followed, you can reset the idle air control valve by turning the ignition keys to the on position for 30 seconds and then turn the keys to the off position then on for 10 seconds and then start.
What are some symptoms of a bad idle air control sensor?
One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. 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.
