is 220 enthusiast

The car is tuned so it does'nt have egr or dpf. I've read live data and everything else seems ok but what i noticed is that the gas pedal precentage when pressed to the bottom should be 100% but from the moment you start the car it stars slowly decreasing 99% 98%... ad so on until it stops to 20%. So the gas pedal is only reading 20% when pressed down completely. Does anyone know what tp do in this situation. I have tried with another gas pedal which had a brand new sensor and tried to clean every connecting parts on the wires. Still no help on the probelm.

hey! im new here so i would like to ask you professionals whats wrong with my is 220. it works well after starting the engine but after driving for about 2km it suffers a significant power loss. but after you turn it off and start it again it works for about another 2km. it shows no fault codes and all this started after the car was parked in my driveway for about a week.