Why does the car shake when driving?
2 Answers
The reasons why the car shakes when driving: The throttle valve is too dirty or the fuel injector has 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, making it difficult to start and causing the car to shake when driving. Under these conditions, the car will only start easily once the carbon deposits have absorbed enough gasoline to become saturated. After starting, the gasoline adsorbed on the carbon deposits will be sucked into the combustion chamber by the engine's vacuum suction force and burned, which in turn enriches the air-fuel mixture. The engine's combustible mixture alternates between being too lean and too rich, leading to idle shaking after a cold start. If the three factors—fuel, air, and spark—are obstructed or not functioning smoothly, the engine's operation will also become unstable, resulting in shaking.
I've been driving for many years, and the most common cause of shaking is tire issues, such as uneven tire pressure, uneven tire wear, or poor balancing, especially when the car wobbles severely at high speeds. Suspension system problems are also a major cause; after the shock absorbers leak, the body jolts when going over bumps. Engine ignition system failures, such as aging spark plugs or a clogged fuel pump, can make the engine run unevenly, transmitting vibrations throughout the car. A bent drive shaft or uneven brake discs can also cause shaking during acceleration or braking. In such cases, I recommend first checking the tire pressure and balancing the tires. If the problem persists, promptly visit a professional repair shop to inspect the suspension and engine. Long-term neglect can exacerbate wear and tear, potentially leading to major accidents. Safety is no small matter, so it should be addressed immediately. Developing a habit of regular maintenance can prevent problems before they arise, such as checking wheel alignment annually, which makes driving much smoother.
