What Causes Engine Vibration in Geely Vehicles?
2 Answers
Engine vibration in cars is most likely caused by insufficient or deteriorated engine oil. Severe Engine Carbon Buildup: The most common cause of car vibration is a dirty throttle body or excessive carbon buildup in the fuel injectors. When there is too much carbon buildup inside the engine, the gasoline sprayed by the cold-start injectors can be largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making the engine difficult to start. In this situation, the engine will only start easily once the carbon deposits have absorbed enough gasoline. After starting, the gasoline adsorbed on the carbon deposits will be drawn into the combustion chamber by the engine's vacuum suction, making the air-fuel mixture too rich. The constantly fluctuating air-fuel mixture causes idle vibration after a cold start. Ignition System Issues: Check the condition of the spark plugs, high-voltage wires, and ignition coils. Poor performance in the ignition system or weak sparking from the spark plugs can also lead to such issues. Unstable Fuel Pressure: If you have already cleaned the engine carbon deposits, throttle body, replaced the gaskets and spark plugs, but still experience body vibration at idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor. Abnormal fuel pump pressure or incorrect readings and poor performance from the intake pressure sensor can also cause body vibration. Aging Engine Components: Car vibration can also be related to worn engine mounts. Engine mounts act as the shock absorption system for the engine, absorbing minor vibrations during operation. If the engine mounts are faulty, these vibrations can be transmitted to the steering wheel and the cabin, causing vibration at idle.
My Geely car started experiencing engine shaking not long after purchase, which almost scared me to death. Upon self-inspection, I found that the spark plugs were aged and needed replacement, causing intermittent ignition. Carbon buildup is also quite common, where residual impurities accumulate in the engine, leading to uneven combustion. If the fuel injectors are clogged or dirty, unstable fuel supply can also cause shaking. Other possibilities include damaged ignition coils, a clogged air filter affecting air intake, or faulty oxygen sensors leading to inaccurate data. Loose or worn engine mounts can also worsen the shaking due to unstable support. I recommend starting with simpler checks, such as spark plug replacement and carbon cleaning, and seeking professional repair if necessary to avoid safety risks—after all, it's the power core, and shaking affects both driving experience and safety.
