Is it normal for the throttle to have a little gap after Pu Sang flameout?

This is normal. Santana engine adopts electronic throttle. After the engine is turned off, the electronic throttle control motor is powered off, the torque exerted by the motor on the throttle disappears, and the throttle is positioned under the action of the return spring. In order to prevent the car from breaking down when the electronic control system of the electronic throttle fails, the throttle return spring makes the throttle open at a small angle, so that the engine can run at high idle speed, and the car can continue driving, but the speed is limited.