trying to help a friend

[kidwell137nfd]

I have a guy here at work who has put three sets of inj. in this 03 and it still acts like it dont want to run. He has a box and cant run it because the truck cuts out like crazy with it on. Any sugestion? He thinks it is tps but i dont think it is.

 

[Breedsrt]

try the fuel control acuator or the pressure relieve valve