What Causes Regular Engine Vibration?

[JackDella]

Engine vibration can be caused by a dirty air filter, expired spark plugs, low idle speed, or abnormal water temperature. Details are as follows: Dirty Air Filter: It is generally recommended to replace the air filter every 10,000 kilometers. If not replaced in time, insufficient air intake can lead to low idle speed, causing engine vibration. Simply replacing the filter can resolve this issue. Expired Spark Plugs: Spark plugs have a limited lifespan. After exceeding 30,000 to 40,000 kilometers, their ignition efficiency significantly decreases, which can affect ignition. This is the most common issue, and replacing all spark plugs can fix it. Low Idle Speed: If the idle speed is too low and causes vibration, it indicates that it is beyond the control range of the engine computer. Abnormal Water Temperature: High water temperature can cause early ignition timing and alter the air-fuel mixture ratio.

[DelArya]

After driving for many years, I noticed the engine has regular vibrations, which can be caused by various reasons. For example, worn-out spark plugs with carbon buildup can lead to uneven ignition flames, causing unstable combustion in certain cylinders. Fuel system issues are also common; clogged or leaking fuel injectors can result in uneven fuel injection, disrupting the air-fuel mixture ratio. A dirty or clogged air filter reduces airflow, leading to engine vibrations. Additionally, if one ignition coil fails, the corresponding cylinder won't function, naturally causing vibrations. Worn or aged rubber mounts in the engine support can also make the entire engine shake severely. If left unrepaired for a long time, it can damage the oxygen sensor or catalytic converter and, in severe cases, shorten the engine's lifespan. I recommend regularly checking spark plugs and filters and replacing them promptly if issues arise—don't skimp on maintenance until a major problem occurs.

[Antonio]

My new car hasn't been driven for long, but the engine sometimes shakes quite regularly, which startled me. Possible reasons include the spark plugs needing replacement as they've aged and can't ignite properly; or the fuel injectors being clogged, causing intermittent fuel supply. A dirty air filter not allowing enough air in can also mess up the air-fuel mixture ratio, making the engine run unevenly. If the ignition coil fails, some cylinders may stop working completely, leading to shaking. Worn-out engine mounts losing their elasticity can transmit vibrations to the car body. If you feel shaking, it's best to address it early; otherwise, the catalytic converter might get clogged and trigger fault codes, making repairs more complicated. For a simple check, see if the spark plugs have turned black and try replacing them; or take it to a professional shop for a thorough inspection—safety first.

[GraceMarie]

The engine is shaking regularly, posing a major safety risk. Faulty spark plugs cause unstable ignition, leading to uneven cylinder operation; clogged or leaking fuel injectors disrupt fuel supply. A blocked air filter affects air intake, while damaged engine mounts amplify vibrations. This impairs driving control, especially at high speeds. It's essential to inspect the ignition coils, fuel system, and mounts. Ignoring this can accelerate component wear, such as cylinder damage or catalytic converter failure. Stop the vehicle immediately for assessment and ensure regular maintenance to prevent issues.