TPS problems on an 87 Chevy K10

[80's Truck kid]

Ok so I got in my truck today, left my road and shifted into 3rd, then the whole truck started bucking. I threw it into neutral (manual trans) and it stops, so I pull over and mess with the TB and everytime I would open it up it would act as if I was feathering it. Then I started messing with the TPS and nothing happened what so ever, also I had a extra TPS so I put that on and still nothing.

A little extra info, Its a Holly 670 CFM TBI, I already replaced all the vacuum lines, also I have replaced the EGR as well.

Thanks in advanced