What Causes Severe Shaking During Car Ignition?

[TaylorRose]

The reasons for severe shaking during car ignition are: 1. Misfire in individual cylinders; 2. Excessive carbon deposits in the engine; 3. Blockage in the intake and exhaust systems; 4. Damaged engine mounts. The car ignition system is designed for spark-ignition engines to operate normally by providing high-voltage electricity to the spark plugs in the correct firing order, ensuring a strong enough spark to ignite the combustible air-fuel mixture. The steps for starting a car are: 1. Ensure the car's handbrake is engaged and the gear is in neutral or P position; 2. Press the brake pedal firmly, and for manual transmission cars, also depress the clutch; 3. Insert the key into the ignition keyhole; 4. Turn the key in the starting direction and hold for 2 seconds to start the car normally.