What Causes Engine Vibration in a Car?
2 Answers
Vehicle engine vibration can be attributed to the following reasons: 1. The engine throttle is excessively dirty or the fuel injector nozzle has excessive carbon buildup. During cold starts, the gasoline sprayed by the fuel injector is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture that makes starting difficult; 2. Poor performance of the ignition system, including spark plugs, high-voltage wires, and ignition coils; 3. Abnormal fuel supply pressure, incorrect intake pressure values, and malfunctioning sensors. Solutions for vehicle engine vibration: 1. Clean the fuel system and inspect the idle speed motor to remove carbon deposits; 2. Check if the spark plugs have excessive carbon buildup and replace them if necessary; 3. Inspect the fuel pressure and replace faulty components.
Engine shaking is indeed annoying, and I've encountered many cases. It's usually caused by issues in the ignition system, such as aging or damaged spark plugs, leading to intermittent ignition and uneven engine operation, especially noticeable during cold starts or idling. Then there are fuel supply problems, like clogged fuel injectors or carbon buildup, resulting in unstable fuel injection and an imbalanced air-fuel mixture, affecting combustion efficiency. The intake system can also be a culprit—a dirty air filter restricts airflow, or a vacuum leak causes insufficient engine breathing, naturally leading to shaking. Mechanical aspects shouldn't be overlooked either; damaged or loose engine mounts can destabilize the engine, worsening vibrations during acceleration or deceleration. Additionally, carbon buildup on valves or in the combustion chamber disrupts normal ignition timing, or poor fuel quality can often be a trigger. Safety first—if you notice shaking, inspect key components early to prevent minor issues from turning into major repairs.
