Car Shakes When Idle: How to Diagnose and Fix the Problem

Some cars have idle speed control systems that regulate the idle speed of the engine. When this system malfunctions or doesn’t regulate correctly, it can cause the engine to run at a lower or higher than normal RPM, leading to shaking while idling. Believe it or not, a loose gas cap can also cause shaking while idling. If the gas cap isn’t completely sealed, it can allow air to enter the fuel system, resulting in poor performance and vibrations. This is an easy problem to fix, just make sure the gas cap is fully tightened each time you fill up. The throttle position sensor helps regulate the amount of air entering the engine, and if it becomes worn or damaged, it can cause the engine to run poorly and shake when idle. This is usually due to normal wear and tear but can be caused by a variety of other issues as well. A professional mechanic should be able to diagnose and repair this issue. - t7a9xr7chf - https://richsautobodyshop.com/blog/car-shakes-when-idle/