Idle speed problem of antelope car

The phenomenon of your car is that the idle speed is high when it is cold, but it is beyond the normal range. It is normal to turn to 800 after the car is hot, and it is too low to drop to 500. Judging from these phenomena, it belongs to the unstable idle speed or no idle speed of hot cars. It is suggested that the diagnosis steps are as follows: firstly, the decoder is used for fault diagnosis; If there is no fault code, the second part is used for initial idle speed adjustment, that is, under the condition that the pipeline is installed normally, there is no air leakage and the ignition timing is correct, all electrical appliances are turned off after hot start, and the engine fault diagnosis sockets TE 1 and E 1 are short-circuited; At this time, the idle speed should be around 800 rpm; If there is no fault code, adjust the idle airway screw or throttle position screw. Otherwise, check or replace the water temperature sensor. If it still doesn't work, check the spark plugs and injectors of each cylinder in turn. It is estimated that this scheme will be solved when it comes down.