Could really use some help

[fixkick]

now my guess
previous owner hacked car, ran in limphome for 3 years at 15mpg, suck fuel bad..... (the illegal hot wire to injector)
new owner, finds hack, fixes hack and find fuel pressure low.
or new owner fixes pressure, and back to limphome again, ecu still bad and closed loop never happens again. nor can EFI work right, ever. sure runs but that be all we can say.

just 3 lines, explain all this.
did i nail it>?

I'd run a new wire from ecu to red injector wire, (i can only pray yellow is ok , i cant see it. )
then see if injector fires, if yes , bad harness now fixed.
if no? the ECU is in fact bad, for sure.