H6 Turn on the air conditioner, and the idle speed is shaking badly. It's okay to run and keep neutral. The throttle is washed, the spark plug is changed, and it still shakes. What should I do?

It is likely that the rubber parts inside the engine bracket are damaged, resulting in serious jitter of the air conditioner. Because the air conditioning pump starts to work, the load of the engine increases, so the jitter will be more severe than when there is no air conditioning. If the rubber inside the engine bracket cracks and ages, it will not play a role in reducing vibration, so the jitter will increase.