5 Symptoms of a Bad Idle Air Control Valve in Your Car
When the engine is running but the vehicle is not moving, this means the engine is idle. During this time, the number of revolutions per minute inside the engine will change. The idle air control valve is responsible for managing the engine idle speed. 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. The valve is connected to the throttle body next to the intake manifold. The engine control unit is what manages the function of the valve. Based on the information it receives like engine load and temperature, it will change the speed of the idle accordingly.
Top 5 Failure Symptoms
When you have a bad idle air control valve in your car, there are several problems and symptoms that will present themselves. If you don’t get the valve replaced immediately, your car will become undrivable. Below are the top 5 symptoms of a bad idle air control valve which you will easily notice.
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. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed. The idle speed may be too high at one moment and then too low at other moments. You will clearly notice this idle speed changing by simply looking at the tachometer on the dashboard.
2. Check Engine Warning Light – Whenever there is the smallest problem or issue with anything connected to the engine, it will cause the central computer to activate the check engine warning light on the dashboard. A bad idle air control valve could certainly be one reason for this to happen. If the number of revolutions per minute seems peculiar to the engine control unit, it will let you know by activating the warning light. Of course, there could be a whole list of other reasons for the warning light to come on too. In any case, you should take your vehicle to the auto shop to get it checked out at once.