Why does the speed of Ariza 5 exceed 1000 as soon as it is started?

It is normal that the idle speed is too high when starting. Cars need high speed to make the engine work normally as soon as possible, and they need rich mixture, so the air intake and fuel injection will increase, resulting in high speed. The colder the weather, the lower the cold water temperature (generally about 85- 1 10 degrees lower than the normal working temperature of the engine), that is, the greater the working temperature difference with the normal engine, the faster the computer will control the idle speed of the cold car, that is, the higher the engine speed when it is just started. Under normal circumstances, depending on the water temperature, the idle speed of the engine will gradually decrease from 1200 until the engine reaches the normal working temperature, and the standard idle speed is about 800 rpm. In addition, high rotational speed is generally the reason for excessive carbon storage. Cleaning the throttle valve in time can usually solve the problem