What Causes Engine Vibration at Idle When the Air Conditioning is On?

[LylaMarie]

Reasons for engine vibration at idle when the air conditioning is on: The air conditioning compressor consumes engine power when operating, increasing the engine load and reducing the engine speed, which leads to engine vibration. When the engine has severe carbon buildup, the gasoline sprayed by the cold start fuel injector is largely absorbed by the carbon deposits, resulting in an excessively lean air-fuel mixture during cold starts. This makes cold starts more difficult and can cause significant vibration. Car air conditioning refers to the air conditioning system installed in vehicles, which can cool, heat, ventilate, and purify the air inside the cabin. It provides a comfortable environment for passengers, reduces driver fatigue, and improves driving safety.