its bc that was an automatic motor and you dont use the other TPS plug on the TB. its only for an electric kickdown for the tranny. if its bucking real bad its prolly bc you have the MAFS too close to the TB and its getting disturbed air. if theirs not a good distance between the MAFS and TB it will run like crap.

plus, how did you relocate the wiring? did you just stretch it? lenghten just the MAFS wires? cut the harness apart and seperate them? the car has been perfect for over 2 yrs now, im sure something you did caused the problem