Mondeo, turn on the air conditioner. Idle speed goes up and down. What's wrong?

Mondeo, turn on the air conditioner. Idle speed goes up and down. What's wrong? Mondeo, turn on the air conditioner. Idle speed goes up and down. What's wrong? The reasons are that the idle air hole is blocked, the idle device is not easy to use, the spark plugs of individual cylinders are too weak, the seals of individual valves are not tight, the intake manifold leaks air, the ignition time is too early or too late, and the idle speed is improperly adjusted, which leads to the idle speed rising and falling. The following is a detailed introduction: 1. Dealing with the unstable idle speed of the car: The most direct way is to adjust the idle speed, and make the engine run at the lowest stable speed by adjusting the throttle opening adjusting screw. 2. Vehicle inspection: Before adjusting the idle speed, it is necessary to carry out a series of inspections on the vehicle, such as engine temperature, valve clearance, ignition system, pipeline tightness, throttle opening, throttle tightness, etc., so it is not recommended for the owner to operate, and it is best to go to a professional repair shop or 4S shop for adjustment. @20 19