What Causes Severe Vibration in a Three-Cylinder Engine?

[SanEmma]

Here are the reasons for severe vibration in a three-cylinder engine: 1. Dirty air filter: The air filter is designed to protect the engine and reduce wear, typically requiring replacement around 10,000 kilometers. Delayed replacement can lead to insufficient air intake, causing low idle speed and engine vibration. 2. Spark plug lifespan: Spark plugs have a limited lifespan, and their ignition efficiency significantly decreases after 30,000-40,000 kilometers, affecting ignition performance. 3. Low idle speed: The engine's idle speed is preset in the computer. When the RPM drops below a certain threshold, the car's computer will automatically adjust it. 4. Abnormal water temperature: The engine operates within a specific temperature range. High water temperature can cause premature ignition timing, altered air-fuel mixture, thinning of engine oil viscosity, and reduced lubrication performance. Common causes include insufficient coolant, thermostat failure, non-functioning fan, or inaccurate temperature control switch, leading to vibration. 5. Clogged fuel injector: The fuel injector in an electronic fuel injection vehicle is a critical component for fuel delivery, with a long lifespan potentially reaching hundreds of thousands of kilometers. However, deposits in gasoline can clog the injector nozzles, causing uneven fuel distribution among cylinders, resulting in inconsistent cylinder operation and engine vibration.