What Causes Severe Car Shaking?
2 Answers
Reasons for severe car shaking: 1. Severe engine carbon deposits; 2. Problems with the ignition system; 3. Misalignment of the drive axle; 4. Uneven brake discs. If the car body shakes due to severe engine carbon deposits, the owner should promptly clean the fuel system and check whether the idle speed control valve has carbon deposits. If there is a problem with the ignition system, the spark plugs should be immediately checked for carbon deposits and replaced if necessary. For misaligned drive axles or uneven brake discs, it is recommended to seek repair at a professional automotive repair facility or 4S shop. Note that slight shaking during normal driving is a normal phenomenon.
I think the car is shaking badly, most likely due to unbalanced tires or deformed rims. I remember once driving on the highway, and when the speed went over 80 km/h, the car body noticeably wobbled. After checking, it turned out the tire dynamic balance wasn't done properly. Spending a few dozen dollars to rebalance the tires fixed the issue. If the rim gets deformed from hitting the edge of a curb, it can also make the wheel rotate unevenly and cause shaking. Additionally, if the brake discs are unevenly worn or not perfectly round, the car body can shake violently when braking. Worn or hardened engine mount rubber losing its cushioning effect is a common cause of steering wheel vibration at idle. Poor dynamic balance of the driveshaft, especially in rear-wheel-drive vehicles, can easily lead to shaking, more frequently in off-road vehicles or trucks. In short, don't delay—get it checked early at a professional shop with proper equipment to prevent small issues from becoming big ones. Regular maintenance of tires, rims, and the braking system is key to prevention.
