What Causes Severe Car Vibration When the Air Conditioner is On?

[KinsleyDella]

Car vibration when the air conditioner is on is caused by: Carbon buildup on spark plugs leading to reduced engine torque output; carbon deposits on intake valves causing abnormal cylinder pressure, prompting the car's computer to detect cylinder misfire and automatically cut off fuel supply; using incorrect gasoline resulting in severe engine carbon buildup; dirty throttle affecting engine operation. Here are the related solutions: The solutions are: Soak the spark plugs in a container with white vinegar for 2 to 3 hours, scrub off the carbon deposits with a stiff brush, then clean them thoroughly with gasoline; drive at high speeds above 4000 RPM to burn off carbon deposits inside the cylinders; choose the appropriate gasoline based on the car's compression ratio; clean the throttle. Engine stalling: A seized compressor directly drags down the engine's RPM, and the engine computer detects the anomaly, leading to excessive fuel injection in an attempt to restore normal engine speed. The seized compressor and engine computer cause severe engine vibration or even direct stalling.