The problem of unstable idle speed at the start of the new Jetta avant-garde cold car

Generally speaking, the idle speed is within the normal range of 800- 1000. Unstable idle speed may be caused by carbon deposit or mud deposit in the fuel injector or idle valve, so please clean it properly. Also, correct the landlord, please don't believe that the new car must be "zero kilometers", and that kind of publicity can only stay in the "slogan" stage. Even if the odometer shows zero kilometers, it may not be accurate. If you unplug the odometer sensor and run100000 kilometers, nothing will be displayed on the odometer. ...

It is normal to turn on the air conditioner and the idle speed suddenly drops. Because when the engine is running normally, the load of the air-conditioning compressor suddenly increases. After a few seconds, the idle speed is too high, which is a normal phenomenon. Please don't worry.