So is there a way to just reflash the ecu to delete the entire egr system? My sisters car has been to the dealer and they've replaced all 4 injectors, the entire egr system, cap and rotor but It still throws the code. I know just removin the hardware is just going to throw constant codes unless we do rewire some stuff with resistors.

Idk if thus is related but there is this hesitation between 2k and 3k rigt after you get back on the throttle.