@bh. You should start a separate thread for your issue. When you do that provide complete info on the car - mileage, past maintenance, etc. Also fill in the blanks under “no one can solve the problem.” Well, some “someones” have done something. So fill us in.
As for the general question in this thread, I’d simply add that the “gas” pedal is not really a gas pedal once you’re on fuel injection. Its really an “air” pedal and “signaler.” The pedal opens the throttle plate and lets more air in. A throttle position sensor and air measuring sensor(s) - most often a mass airflow sensor - tell the computer what’s going on with that and that’s part of how the computer decides on fuel flow to the injectors. For starting & idling there is also a computer controlled idle air control valve. So the computer does do everything you used to do with your foot. At this point, pumping the “air” pedal before you turn the key does nothing. You might as well wave chicken bones over the ignition. Trying to “give it gas” when you turn the key to start it is actually messing with the computer’s “plans” for getting it running - because you’re allowing in more air then is supposed to go.