I know that BKRK is the 3100 Beretta Manual Trans, and BNFM is 3.4L Camaro Automatic, but BPJH I am not sure of. Possibly 3.4L Camaro Manual.
Yes, that's what I meant about the 0.9 to 1.5v range-I was using an adjustable bench supply, but the ECU was NOT powered up.
Looking at the result you had with the simulation, I am rethinking just closing up the case. Looks like I'll have to hunt down that 1K resistor and remove it, then fit a 200K or 470K resistor (I am pretty sure I have some SMT 470K's laying around...somewhere...)