What Causes Engine Shaking When Starting the Car?

[BrielleAnn]

Engine shaking when starting the car can be attributed to the following reasons: 1. Worn or Loose Engine Mounts: Engine mounts are rubber blocks placed between the engine and the car frame. Their purpose is to reduce vibrations and absorb shocks during engine operation, thereby securing the engine in place. If the engine mounts become worn or loose, the engine's shaking will become noticeably abnormal. 2. 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, noticeable engine vibration, and sometimes accompanied by a sputtering sound. This can be caused by a faulty ignition coil. 3. Carbon Buildup: Carbon deposits can accumulate in various parts of the engine, including the cylinders, throttle body, spark plugs, and intake system. These deposits are related to the engine's power output. Excessive carbon buildup inside the engine can reduce ignition energy and decrease air intake efficiency, ultimately leading to symptoms such as engine shaking and poor acceleration.