How to Solve Car Shaking and Lack of Power During Acceleration?
1 Answers
Car shaking and lack of power during acceleration are generally caused by severe carbon buildup in the engine throttle, ignition system issues, worn spark plug electrode gaps, aging engine components, incomplete combustion of the air-fuel mixture, or unstable fuel pressure. It is recommended to promptly visit a 4S shop to diagnose the specific issue and ensure driving safety. Detailed causes and solutions for car shaking and lack of power during acceleration are as follows: 1. Severe engine carbon buildup: The most common cause of car shaking is a dirty throttle or excessive carbon buildup in the fuel injectors. When there is too much carbon inside the engine, the gasoline sprayed by the cold-start injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making it difficult to start. In this situation, the car will only start easily once the carbon deposits become saturated with gasoline. After starting, the gasoline adsorbed on the carbon deposits is drawn into the combustion chamber by the engine's vacuum suction, making the air-fuel mixture too rich. This fluctuation between lean and rich mixtures causes idle shaking after a cold start. The lower the temperature, the more fuel is needed for a cold start, and the presence of carbon deposits will significantly affect the success of the cold start. Solution: Clean the fuel system and check if the idle control valve has carbon buildup, which should be cleaned if necessary. 2. Ignition system issues: Inspect the 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. Solution: Check if the spark plugs have excessive carbon buildup and replace them if necessary. 3. Unstable fuel pressure: If you have already cleaned the engine carbon deposits, throttle body, replaced gaskets, and spark plugs but still experience idle shaking, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor. Abnormal fuel pump pressure or faulty readings from the intake pressure sensor can cause the car to shake. Solution: Check the fuel pressure and replace components if necessary. 4. Aging engine components: Car shaking can also be related to worn engine mounts. Engine mounts act as the engine's shock absorption system, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations will transfer to the steering wheel and cabin, causing shaking at idle.
