What are the causes of abnormal engine vibration?
2 Answers
Reasons for abnormal engine vibration: 1. Damaged spark plugs: Cracks in the ceramic part of the spark plug can cause the spark plug to fail to ignite. If one cylinder is not working, it can also lead to acceleration vibration. In this case, the spark plug should be replaced; 2. Poor fuel quality: This can result in poor atomization of the fuel injector, causing incomplete combustion of the air-fuel mixture in the cylinder, which also leads to engine vibration and lack of power. It is recommended to use higher-grade gasoline after finishing the current tank and perform a fuel system cleaning; 3. Excessive carbon deposits: A dirty throttle body or excessive carbon deposits on the fuel injector can cause the engine to vibrate more severely than usual when starting the vehicle, and may even require multiple attempts to start. The throttle body and fuel injector should be inspected. If the throttle body is found to be dirty or the fuel injector has excessive carbon deposits, they should be cleaned promptly; 4. Unstable oil pressure: If you have already cleaned the engine carbon deposits, changed the oil and spark plugs, but still notice body vibration at idle, it is recommended to visit a 4S shop to check the fuel supply pressure and the intake pressure sensor for normal operation. The oil pressure should be checked, and components should be replaced if necessary.
After driving for a long time, I've encountered engine shaking, which is quite a common issue. The most common cause is spark plug problems—over time, electrode wear or excessive carbon buildup can lead to uneven ignition. Loose engine mounts are another reason; aging rubber components can cause the entire engine to wobble, making it feel shaky while driving. A clogged air filter affects air intake, disrupting the air-fuel mixture ratio and causing shaking. Excessive carbon buildup in the cylinders leads to unstable combustion, resulting in this issue. Faulty sensors, such as the throttle position sensor, can send incorrect signals, causing the engine control unit to misfire. A malfunctioning fuel pump or clogged fuel injectors, leading to uneven fuel delivery, can also be factors. Another possibility is a faulty ignition coil, which fails to provide a consistent spark. This shaking not only makes driving uncomfortable but also increases fuel consumption, and prolonged neglect can damage the engine. During regular maintenance, I check the spark plugs and change the oil periodically to reduce such problems. I recommend that drivers check the engine light codes as soon as they notice shaking, and if necessary, consult a mechanic to diagnose the issue before it worsens. Safety first, after all.
