What's the matter with Changan Starlight stepping on the gas pedal and occasionally not walking?

If you say that the engine is not rotating at that speed, first check whether the ignition time is normal (if the engine has electricity and the car is not moving, it is a clutch problem) (and check whether it is caused by vacuum leakage somewhere in the engine).

If the ignition time is normal, look at your ignition system (such as whether the contents of the spark plug have been used for a long time, whether the gap inside is too big or too small)

Everything's fine. I'm testing the fuel injector.

Whether it is normal or not is a problem between your throttle and your computer. . . . .

It is your throttle position sensor that makes the computer input the wrong signal to the fuel injector, which causes the fuel injected by the fuel injector to fail to meet the requirements of the mixture combustion ratio in the intake pipe.