My starter went out (1991 LS400), once I replaced it I had no fire or fuel. Here's what tests I did. First on EFI upper left 12v, upper right 3.5v, B+ .15v JUMPER to B+ efi upper left 12v, upper right 12v, no fuel pump relay voltage JUMPER to B+ and FP dataport efi upper lt 12v, upper right 12v, fuel pump relay 12v.........Basically with jumper to B+/FP dataport car would start but run poorly with some light back firing......Any help would be appreciated, thanx in advance