NEED SOME HELP. 04.5 Not Getting Proper Fuel Pressure
 

i have i 2004.5 cummins h.o need some help....just put a transmission in on saturday(bd Torque, transgo shift kit and full rebuild) truck was acting up before that being really sluggish sometimes, put trans in went super slugish drove maybe 20 kilometers like that, monday at work put new fuel filter in and realized wasnt getting fuel...pulled tank lift pump melted..put a carter fuel systems limp pump thats mounted on fuel filter housing on....working alright but olny getting 15000 psi at full throttle.....going to change tps with one in a 2005 thats at work(i work at a dealership im 17 and a registerd salesman and still in grade 12 of highschool Money is Tight i dont live at home) would the tps or wiring cause any of this?? runs good just still not perfect not missing or anything like that....any ideas out there? could use some help on this one. thanks