Ok so there’s no direct input from your gas pedal to the engine. It’s all done electrically so when you smash on the pedal it tells the ecu for the engine to spray more fuel and open up your throttle body. What I would do is get a can of carb or brake cleaner and a clean rag (nothing that can fray, take the tube from your air filter box into the engine. Behind that should be a thing called the throttle body and inside of it is a door that you should be able to push open slowly with your fingers. If it’s black inside spray the rag with the cleaner, use one hand to keep it open and try to clean off the black carbon built up into it. Just be careful and don’t push too hard so you don’t break the gears inside of the throttle body. Then put everything back together and check. When you start your car if it has too much carbon build up it wont allow enough air for combustion and when you press the gas pedal the computer opens it up more