What Causes Severe Engine Shaking?
1 Answers
Severe engine shaking can be caused by the following reasons: 1. Engine misfire, which mainly refers to one or more cylinders in the engine not working properly. This is usually manifested as: the exhaust gas flow from the car has obvious intermittency, and the exhaust pipe shakes violently, making the engine's shaking clearly noticeable. 2. Deterioration or loosening of engine mounts. Engine mounts are rubber blocks placed between the engine and the car frame. Their function is to reduce the vibration and buffering during engine operation and to secure the engine in place. Once these mounts deteriorate or become loose, the engine's shaking will become abnormally severe. 3. Carbon buildup issues, including carbon deposits in the cylinders, throttle body, spark plugs, and intake system. When there is excessive carbon buildup inside the engine, the car's ignition energy, intake efficiency, and air-fuel mixture ratio will be affected, leading to unstable power output and shaking during idling and acceleration. 4. Fuel system failure, such as adding an incompatible fuel grade (for example, using 92 instead of 95), which reduces the car's power output and performance; or due to a blocked fuel tank vent, clogged fuel tank switch, fuel filter, or fuel lines between the tank and the carburetor, which cannot supply the required amount of fuel, resulting in a lean air-fuel mixture and engine shaking.
