What Causes Engine Shaking and Stalling?
1 Answers
Engine shaking and stalling are most commonly caused by a dirty throttle body or excessive carbon buildup in the fuel injectors, or may be related to aging engine mounts. The specific reasons are as follows: 1. A dirty throttle body can cause improper throttle closure or a stuck idle stepper motor, both of which can result in excessively high engine idle speed. Carbon deposits generated during engine operation can also cause vehicle shaking. Therefore, when the vehicle shakes, the throttle body and fuel injectors should be checked first. If the throttle body is found to be dirty or there is excessive carbon buildup in the fuel injectors, they should be cleaned promptly. 2. Vehicle shaking can sometimes be related to aging engine mounts. Engine mounts are part of the engine's vibration damping system. If there is an issue with the engine mounts, it can cause shaking during idle. The engine may increase its load when electrical systems are turned on, leading to a drop in idle speed. To compensate for the shaking caused by the idle speed drop, the engine will automatically raise the RPM slightly. When turning on the vehicle's electrical systems, especially when starting the car's air conditioning in summer, the engine often shakes. If the shaking during idle does not decrease when the car's air conditioning compressor is running, this shaking is likely caused by aging engine mounts and requires timely replacement of new engine mounts.
