Why does the car shake and have unstable idle speed when the air conditioner is turned on?

[ElianaLynn]

Unstable idle speed and shaking when the air conditioner is on can be caused by carbon deposits, high pressure, and other reasons. Throttle Body: Severe carbon deposits in the throttle body can block the normal air intake of the engine. Insufficient engine power makes it difficult to drive the compressor, or it can only barely do so. When the air conditioner is turned on, the engine load increases, and the throttle opening expands. At this point, the issue of dirt is magnified, causing the throttle to stick or fail to open to the appropriate position, resulting in restricted air intake. Compressor: If the compressor pressure is too high, the increased engine load will affect the car's stability. Solution: Regularly clean the throttle body and carbon deposits in the engine to avoid high compressor pressure.