What Causes Engine Idle Vibration After Warming Up?

[MacDaisy]

Engine idle vibration after warming up can be attributed to the following reasons: 1. An improper air-fuel mixture ratio in the engine compartment, which affects engine vibration; 2. Prolonged use of spark plugs leading to aging of the ignition coils, high-voltage wire deterioration, and leakage issues, resulting in reduced ignition capability; 3. Carbon buildup on the engine's valves and intake passages, which absorbs a significant amount of fuel, affecting the fuel-air mixture and leading to reduced vehicle power and malfunctioning of the coolant temperature sensor. The car engine is the device that provides power to the vehicle, determining its performance, fuel efficiency, stability, and environmental friendliness.