What Are the Factors Causing Engine Vibration?
3 Answers
Engine vibration can be caused by the following factors: 1. Dirty air filter: Generally, it should be replaced every 10,000 kilometers. If not replaced in time, insufficient air intake can cause low idle speed, leading to engine vibration. Simply replacing the filter can solve the issue. 2. Spark plug lifespan: Spark plugs have a limited lifespan. After 30,000 to 40,000 kilometers, their ignition efficiency significantly decreases, affecting ignition. This is one of the most common issues, and replacing all spark plugs can resolve it. 3. Low idle speed: If the idle speed is too low and causes vibration, it indicates that it is beyond the control range of the computer. 4. Abnormal water temperature: High water temperature can cause early ignition timing, changes in the air-fuel mixture ratio, thinning of engine oil viscosity, and reduced lubrication performance. 5. Clogged fuel injectors: Impurities in gasoline can clog the injector nozzles, leading to inconsistent fuel injection among injectors. This causes uneven cylinder operation and engine vibration. 6. Carbon deposits and oil sludge clogging: Over time, carbon deposits and oil sludge can accumulate in the throttle body, idle valve, and intake ports, obstructing airflow and affecting idle stability, leading to vibration. 7. Low cylinder pressure: Engines come in 3-cylinder, 4-cylinder, 5-cylinder, 6-cylinder, and 8-cylinder configurations. If one cylinder is not functioning properly, it can result in a misfire, causing engine vibration.
Every time I drive, I feel the engine shaking, which is really annoying. Common causes include aging or faulty spark plugs, which are responsible for igniting the gasoline. If there's excessive carbon buildup or wear, the ignition becomes unstable, leading to shaking. Then there's the issue of fuel supply—clogged fuel injectors or an underperforming fuel pump can result in insufficient fuel delivery, causing an imbalance in the air-fuel mixture and engine vibration. The air intake system, such as a dirty air filter or a leaking intake pipe, can also affect the air intake volume. Another factor is a damaged engine mount, which secures the engine and absorbs vibrations. If it's aged or broken, the shaking becomes very noticeable. Other issues like incorrect ECU sensor signals or a stuck idle control valve can also cause abnormal vibrations. Small problems are easier to fix if addressed early, but if ignored, they can lead to more serious damage or even a breakdown. I recommend taking it to a professional shop for inspection instead of trying to fix it yourself.
Engine vibration can range from minor to severe, with numerous contributing factors. The ignition system is often the primary culprit—worn spark plugs, aging high-voltage wires, or faulty ignition coils can all lead to delayed ignition and unstable cylinder pressure, resulting in vibration. On the fuel system side, clogged fuel injectors or insufficient fuel pump pressure can disrupt fuel delivery. Additionally, air supply issues such as a dirty throttle body, intake manifold leaks, or a malfunctioning mass airflow sensor can affect air-fuel mixture. Mechanical problems like damaged engine mounts or cylinder imbalance (e.g., worn piston rings) can also transmit vibrations. Occasionally, the issue may stem from the ECU receiving incorrect signals, such as from a faulty crankshaft position sensor. If you notice vibration during daily driving, address it promptly to avoid high-speed hazards.
