Help with stock EFI

That’s what I have. Everything from the pdf to the engine and computer is untouched. I cut the wires off that leave the pdf to the van at the firewall and the took the obdII port out. I think I’ll mount it under the hood near the pdc. I’m not going to tear into the back of the pdc until I hear it run. Then I’ll start weeding out unused wires.
I’m having a hard time understanding your train of thought here. What’s a pdf?