What are the causes of engine shaking in a car?

[StEsther]

Engine shaking can be attributed to the following reasons: Aging or loosening of engine mounts: Engine mounts are rubber blocks placed between the engine and the frame. Their purpose is to reduce vibration and provide cushioning during engine operation, as well as to secure the engine in place. Once these mounts age or become loose, engine shaking becomes noticeably more pronounced. Engine misfire: An engine misfire occurs when one or more cylinders fail to function properly. Common symptoms include intermittent exhaust flow, severe shaking of the exhaust pipe, and noticeable engine vibration, sometimes accompanied by a sputtering sound. This is often related to faulty ignition coils. Engine carbon buildup: Carbon deposits can accumulate in various parts of the engine, such as the cylinders, throttle body, spark plugs, and intake manifold. These areas are critical to the engine's power output. Excessive carbon buildup reduces ignition energy and intake efficiency, ultimately leading to engine shaking and sluggish acceleration. Fuel system malfunction: Using an incompatible fuel grade can reduce the car's power output and performance. Alternatively, blockages in the fuel tank vent, fuel tank switch, fuel filter, or fuel lines between the tank and carburetor can restrict fuel supply, resulting in a lean air-fuel mixture and engine shaking.