What Causes Car Shaking After Ignition?

[DiWalker]

Car shaking after ignition can be attributed to the following reasons: Engine Misfire: Engine misfire mainly refers to one or more cylinders in the engine not functioning properly. This is usually manifested as intermittent exhaust gas flow, severe shaking of the exhaust pipe, and noticeable engine vibration, sometimes accompanied by a sputtering sound. Worn or Loose Engine Mounts: Engine mounts are rubber blocks placed between the engine and the car 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 become worn or loose, the engine's vibration will become significantly more pronounced. Replacing the engine mounts can greatly reduce this effect. Carbon Buildup Issues: Cars are inevitably prone to carbon buildup, which includes carbon deposits in the cylinders, throttle body, spark plugs, and intake system. When there is excessive carbon buildup inside the engine, the car's ignition energy, air intake efficiency, and air-fuel mixture ratio can be affected, leading to unstable power output. This results in shaking during idling and acceleration.