Wonn't the EFI car release the accelerator pedal without injecting oil?

First of all, the throttle of the EFI car does not control the fuel injection, but controls the opening and closing of the throttle. Step on the accelerator pedal, and the fuel injection quantity is automatically adjusted by the computer by controlling the opening and closing of the accelerator.

Then as long as the ignition is started and the engine starts idling, the engine will continue to work and the ECU will control the fuel injection. When the vehicle is running, if the speed is above 1800-2000 rpm (different values for different vehicles), the fuel injector will stop, and when the speed is lower than this value, the fuel injection will continue to maintain the normal operation of the engine.