What Causes Sudden Engine Shaking During Ignition?

1 Answers
Tracey
07/29/25 8:15pm
Reasons for sudden engine shaking during ignition: 1. Misfire in individual cylinders: The main issue lies in malfunctioning or damaged ignition coils causing single or multiple cylinder misfires, particularly noticeable during ignition; 2. Excessive engine carbon buildup: When carbon deposits accumulate to a certain level in the engine, detonation occurs, leading to abnormal engine shaking; 3. Blocked intake/exhaust system: If the engine's breathing is obstructed; 4. Damaged engine mounts: When engine mounts are damaged, not only does the engine lose vibration damping, but severe shaking also occurs during ignition, especially noticeable during rapid acceleration or deceleration.
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