What causes the car to shake when accelerating?
2 Answers
The reason why the car shakes when accelerating is due to problems with the engine's ignition system or intake system. The ignition system of a car engine consists of spark plugs and ignition coils. Spark plugs are consumable parts that need to be replaced regularly. If spark plugs are used for a long time, the electrode gap will increase, and carbon deposits will form on the electrodes, affecting the spark plug's ignition. Ignition coils may fail after prolonged use. If the ignition coil fails, it will cause insufficient ignition energy in the spark plugs, affecting the engine's operation. If the throttle valve malfunctions, it needs to be replaced. Over time, carbon deposits are likely to form on the back of the throttle valve. Car owners can regularly clean the carbon deposits from the vehicle's throttle valve.
I've encountered the issue of the car shaking when accelerating several times, and experience tells me there are several common causes. First, problems with the engine's ignition system are the most frequent, such as aging spark plugs or faulty ignition coils, leading to uneven combustion and jerking during acceleration. The fuel system also needs checking—unstable fuel pump pressure or clogged injectors can cause inaccurate fuel delivery, making the engine struggle. Second, issues in the drivetrain, like a loose or worn driveshaft, can transmit vibrations during sudden acceleration. Incorrect tire balance or deformation can also amplify shaking at high RPMs. Don’t overlook the engine mounts’ rubber components—if they’re worn or loose, engine movement directly affects the car’s body. Safety is crucial, so I recommend immediately replacing spark plugs or checking tire pressure. If the shaking persists, take it to a professional shop right away. Regular maintenance of the engine and chassis can prevent such problems, saving a lot of hassle.
