Why does my engine shake then turn off?
Why does my engine shake then turn off? Shaking or vibration may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal idling RPM which may also cause the motor to shake or vibrate more than normal. What causes the Check Engine light to turn off at idle? At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. The check engine light will randomly turn...