What Are the Reasons for Severe Engine Shaking When Cold but Normal When Warm?

[JadeRose]

Severe engine shaking when cold but normal when warm can be caused by: 1. An inappropriate air-fuel mixture ratio in the engine compartment; 2. Spark plugs that have been used for too long, aging ignition coils, aging high-voltage wires of the spark plugs, and leakage issues; 3. Carbon buildup on the engine's valves and intake passages; 4. Malfunctioning coolant temperature sensor. The engine is the device that provides power to the car, determining its power, fuel efficiency, stability, and environmental friendliness. It is categorized into diesel engines, gasoline engines, electric vehicle motors, and hybrid motors. Methods for engine maintenance include: 1. Regularly changing the engine oil and oil filter; 2. Periodically cleaning the fuel system, car radiator, and crankcase.