When turning the air conditioning on, the engine goes crazy: speed suddenly drops to 550 rpm, and then raise to normal, 750 rpm. I have already checked if it has code OBD2 and it indicates that there are no code errors.The idle speed has been cleaned and the PCV valve checked and replaced. I have noticed that sometimes this failure appears even without the air conditioning being turned on, but it is less noticeable. Actually, when turning the air conditioning on, the compressor is immediately activated and the engine takes from 3 to 4 seconds to accelerate, which means that the engine reduced… Read complete