What Are the Causes of Engine Shaking Faults?
2 Answers
Here are the causes of engine shaking faults: 1. Shaking caused by engine mechanical components: The engine continuously wears during operation, and the gap between the cylinder wall and the piston will also become larger. However, the degree of wear in each cylinder may not be the same. During cold starts, the lubrication effect of the engine oil is relatively poor, and the gap between the cylinder and the piston may leak some high-temperature gas, leading to unstable cylinder operation and a certain reduction in power output. The cost of detection and repair is also relatively high. 2. Abnormal water temperature sensor: The operating condition of the engine is usually judged by the water temperature sensor. If the sensor transmits incorrect information (usually manifested as a significant difference between the transmitted temperature and the actual external temperature), it can cause abnormal fuel injection by the engine's fuel injector, making shaking problems inevitable.
Last year, my car's engine was also shaking badly, causing the entire body to vibrate while driving. After consulting with a repair friend, several possible causes were identified: the most common issue is with the ignition system—spark plugs may have aged or ignition coils could be faulty, leading to a cylinder misfire and uneven combustion. The fuel system should not be overlooked either; clogged fuel injectors due to carbon buildup or insufficient fuel pump pressure can result in a mixture that's too lean or too rich, triggering vibrations. Additionally, if the engine mounts are worn or loose, their shock absorption deteriorates, making vibrations more noticeable in the vehicle body. Ignoring these issues not only makes driving uncomfortable but also increases fuel consumption and accelerates engine wear. Now, during every maintenance check, I inspect the spark plugs and mounts—prevention is better than repair, avoiding breakdowns that could cause delays. Also, carbon buildup in the throttle body can cause trouble; regular cleaning is a simple yet effective way to reduce the likelihood of malfunctions.
