The idling speed of EFI Pu Sang is unstable. What is the reason?

There is usually no need to clean the throttle valve. The idle speed of a cold car is inherently high. Generally, in winter, the idle speed will slowly decrease as the car warms up.

When the car is in a cold state, the idle speed rises and falls. First of all, the idle relay (that is, the idle motor) needs cleaning. Second, the choke needs cleaning. Third, the ignition time of the distributor needs to be adjusted, because the ignition time is wrong.

The ignition time is too early, so just find a mechanic to fix it for a while.

It is suggested to adjust the ignition time before going out for test run. If it doesn't work, continue to adjust it and adjust it several times.

Cleaning the idle relay is very simple. If his asking price is higher than 30 yuan's, he can clean it himself. He can clean it several times by buying a better cleaner, such as (car attendant, 3M, with advertisements).