What are the reasons for severe shaking of the car after ignition?
2 Answers
The reasons for severe shaking of the car after ignition are: 1. Poor gasoline quality leading to incomplete combustion of the air-fuel mixture in the cylinder; 2. The engine has been driven for too many miles; 3. The working performance of the spark plugs has weakened; 4. Excessive carbon deposits in the intake tract and piston top causing poor atomization; 5. Malfunction of the sensor or computer board itself; 6. The vehicle is too old with mechanical aging. The solutions for severe shaking of the car after ignition are: 1. Use high-quality gasoline; 2. Check the wear of the spark plugs or replace them; 3. Clean the carbon deposits on the throttle and idle valve; 4. Check the sensor or computer board.
I've been driving for over a decade and have encountered several instances where the entire car shook like a sieve after ignition. The most common issue is worn-out spark plugs - my old car once shook so violently I could barely hold the steering wheel because of this. Another possible cause is faulty ignition coils, which can prevent a cylinder from firing altogether. Deteriorated engine mount rubber can also transmit vibrations directly into the cabin, making it feel like sitting on a massage chair. A dirty throttle body affecting air intake or carbon buildup clogging the fuel injectors can also cause trouble. Poor fuel quality leading to incomplete combustion is particularly common - last time I tried saving money with gas from a small station, the shaking started immediately. When this happens, don't tough it out; get to a professional repair shop right away, especially for older vehicles that need prompt attention.
