What Causes Engine Vibration When the Air Conditioner is On?

[LaLuna]

Engine vibration when the air conditioner is on can be attributed to the following reasons: 1. Carbon buildup in the vehicle, especially in the throttle body: As the vehicle accumulates more mileage, carbon deposits can form in various parts, particularly in the throttle body. If the throttle body is excessively dirty, it can obstruct air intake, causing the engine to struggle or barely manage to power the compressor. This results in noticeable engine vibration when the air conditioner is turned on. 2. Engine mount collapse or damage: If the engine mount collapses or becomes damaged, the engine's balance is disrupted. When the air conditioner is activated, the compressor's operation may reach a resonant frequency, leading to increased vibration.