ok so truck starts runs for a minute then revs up and dies then i need to start it with ether then it will run now i just put on a rebuilt injection pump could i be geting air in with the fuel system or is my mechanical lift pump bad

 

sounds like air bud. how much fuel is in your tanks? did u put that injector return line kit on yet?

 

Next time you start it and it dies, spin off the fuel filter and see how full it is. If it isn't completely full then you have air intrusion.