What Causes Engine Vibration?
2 Answers
Engine vibration can be caused by: 1. One or more cylinders not functioning properly in the engine; 2. Worn-out or loose engine mounts; 3. Excessive carbon buildup in cylinders, throttle body, spark plugs, or intake system; 4. Partial blockage in fuel tank switch, fuel filter, or fuel lines between tank and carburetor; 5. Leaks in intake manifold or EGR valve; 6. Malfunctioning intake pressure sensor or mass airflow sensor. For engine maintenance, pay attention to: 1. Regular oil and oil filter changes; 2. Maintaining good crankcase ventilation; 3. Periodic crankcase cleaning; 4. Regular fuel system cleaning; 5. Routine radiator maintenance; 6. Fuel system cleaning.
I remember once when I was on a long-distance drive, the engine suddenly started shaking like a sieve, and I could feel the seat vibrating. Common causes mainly include uneven ignition due to aged or carbon-fouled spark plugs, which leads to incomplete combustion and engine vibration. Another reason could be the aging or breakage of the engine mount rubber, which fails to absorb vibrations effectively, causing the whole car to shake. A dirty air filter can also affect the air intake, disrupting the fuel-air mixture ratio and making the engine run unevenly. Additionally, faulty ignition coils or loose high-voltage wires can cause intermittent vibrations, so it's important to check if the spark plug wires are intact. After prolonged high-speed operation, worn piston rings may also increase internal friction. In such cases, I recommend turning off the engine first and checking basic components under the hood. Never push through it, as worsening vibrations can damage more parts and even compromise safety. Regular maintenance of spark plugs and replacing filters can significantly reduce such risks. Since I started checking them every 5,000 kilometers, my engine has been running much smoother.
