Old focus, why does the idle speed go up and down after turning on the air conditioner? Is it necessary to clean the throttle? Is it necessary to match anything after cleaning?

Vibration prevention and oil leakage are very common. If there is only a little oil stain, the anti-vibration and damping are normal and need not be replaced. You can try it yourself, press the corner hard, and then release it suddenly. If the car does not move after shaking for two or three times, it means that the shock absorption is good and there is no need to change it. If it is shaken many times, it means that the vibration isolation is broken and can only be supported by springs. Change it quickly. In addition, the idle speed is unstable. Does the car shake badly when idling?