Why does my car shake a lot when I stop?
If your vehicle is shaking when you are idling at a complete stop, the problem is likely to be damaged or broken motor mounts or transmission mounts. Broken motor or transmission mounts can result in severe motor shaking and should be fixed before causing other serious mechanical problems.
Could a bad alternator cause a rough idle?
Rough Running Drops in electrical output from a failing alternator can cause these systems to malfunction, leading to a poorly running engine. Symptoms will be rough idle, misfires, poor acceleration, hesitation and stalling.
What does it mean when your car Idles rough?
My car has 128000 miles. My car has an automatic transmission. This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into the engine.
Why does my check engine light light up when I idle?
This is primarily to make sure that the emission controls are working properly, but a rough idle can cause a malfunction code to be sent to the computer. If this happens, your “Check Engine” light on the dashboard will light up.
What should you do if your car idles for a long time?
How your engine idles is a good indicator it its overall health; addressing the problem sooner rather than later and checking all potential causes is important. If you’re unsure what the problem is, it is always a good idea to call in the professionals for a diagnosis.
How does the idle speed of a car work?
This valve is controlled by the vehicle’s computer which will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed.