What Causes the Car to Shake When Just Started?
1 Answers
Here are the reasons why the car body shakes when just started: 1. The throttle is dirty or the fuel injectors have excessive carbon deposits. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold-start injector will be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts. This causes the car body to shake when just started and makes the vehicle difficult to start. 2. It is recommended to clean the fuel system and check whether the idle speed motor has carbon deposits and clean them off. 3. Check the working condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or weak spark plug firing can also lead to such symptoms. The solution is to check if the spark plugs have excessive carbon buildup and replace them if necessary. 4. If you have already cleaned the engine carbon deposits, cleaned the throttle, replaced the oil seals and spark plugs, but still notice the car body shaking at idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor for proper functioning. Abnormal fuel pump supply pressure or incorrect readings and poor performance of the intake pressure sensor can also cause the car body to shake. Also, check the fuel pressure and replace components if necessary.
