Why is my antelope car idling unsteadily when it is cold?

The phenomenon of unstable idle speed during cold start is related to many reasons, such as excessive carbon deposition in intake system such as throttle valve and idle valve, low fuel pressure, poor atomization of fuel nozzle and poor working performance of ignition system.

On the one hand, it is directly related to the working performance of spark plugs, high-voltage lines and ignition coils, for example; On the other hand, if the idle speed control valve itself does not work well and the related sensors do not work well, it will also lead to the phenomenon of idle speed jitter of cold car, such as water temperature sensor, air flowmeter or manifold pressure sensor.