What Causes Engine Shaking While Driving?
2 Answers
Engine shaking while driving may be caused by aging or loosening of engine mounts, engine misfire, and other reasons. Below is an introduction to engine shaking. 1. Common issues: Aging or loosening of engine mounts, engine misfire, carbon buildup in the engine, fuel system malfunctions, and intake system malfunctions. 2. Cold start: During a cold start, incomplete combustion of gasoline can cause the engine to shake, which is normal and will improve after the engine warms up. Some vibration is inevitable when the engine is running, but under normal circumstances, the engine's vibration should be smooth and regular. If you can clearly feel increased or persistent engine shaking, it's important to have it inspected and repaired.
Engine shaking issues are quite common. Having driven for decades, I've seen many cases, with the most frequent being problems in the ignition system—aging spark plugs or faulty ignition coils causing uneven combustion. Clogged fuel injectors can also lead to unstable fuel supply, making the engine shudder like it's hiccuping. Excessive carbon buildup is a major issue, especially from incomplete fuel combustion during long-term city driving; if not cleaned in time, it can worsen the shaking. Another cause is loose or worn engine mounts; when the rubber components age, they can't support the engine's weight, leading to body vibrations. Air system issues, like a clogged air filter affecting airflow, or faulty sensors reducing control precision, can also be culprits. Remember, never drive a shaking car on the highway—get it checked by a professional shop early to avoid damaging the transmission or pistons. Regular maintenance should include spark plug replacement and carbon deposit cleaning.
