Yea. The resistor box driver simply fools the ECU into thinking it's operating high impedance injectors. It's the peak and hold drivers that modified the current to the injectors to create more accurate open and close timing. Just about all OEM computers are designed to work with high impedance injectors mainly due to cost. It's one less thing for manufacturers to have to design when performance isn't a concern. It's funny though, modern injector technology has caught up and big high impedance injectors can actually out perform their low impedance counterparts. They are just very pricey.