What is the reason why the accelerator position of the car is on for a while, and how to deal with it?

In front of the foot brake and throttle is the engine compartment, which will generate heat after the engine runs for a period of time. Moreover, most exhaust pipes go down to the bottom of the car from there, probably because the insulation layer has no heat energy and is induced by the partition. Check whether there is a problem with the insulation. Your new car can go back to the 4S shop to deal with it.