Ive had a few head scratch moments with GTOs - firstly I saw one that was a JDM import and had no resistor pack in the wiring harness - yet had low impedance injectors, this caused the ECU to kill itself.
Cant say exactly why the car was equipped like that. But I put in a hand made resistor pack and it was good after that. But working with mitsu V6 engines is nice. Ive put a lot of them in 1998 GDI galants.