Why does the car shake violently when starting?
1 Answers
It may be due to insufficient combustion of gasoline in the engine, resulting in inadequate power supply, or the fuel injector being stuck or clogged. Many cases of engine shaking are caused by fuel injector blockage or sticking, leading to insufficient fuel supply and power loss, which in turn causes the engine to shake. The reasons for car shaking are as follows: 1. A dirty throttle body or excessive carbon buildup in the fuel injector can cause shaking: After driving for a certain distance, a dirty throttle body may cause it to not close properly or the idle speed stepper motor to get stuck, both of which can result in excessively high engine idle speed. Carbon buildup generated during engine operation can also cause vehicle shaking, especially when starting the car. The engine may shake more violently than usual, and sometimes it may even fail to start on the first attempt. When the vehicle shakes, the throttle body and fuel injector should be checked first. If the throttle body is found to be dirty or the fuel injector has excessive carbon buildup, they should be cleaned promptly. 2. Aging engine mounts can also cause shaking: Car shaking can sometimes be related to aging engine mounts. Engine mounts are essentially the shock absorption system of the engine, responsible for absorbing minor vibrations during engine operation. If the engine mounts are faulty, these vibrations can be transmitted to the steering wheel and the interior of the car, causing shaking at idle speed.
