got a guy with a 03'..has edge and air dog..thats it. doesnt want to start. everything was fine until one day, it just wouldnt start. cracked injector lines and there wasnt much coming out while cranking. i had a cp3 pump laying around, stuck it on there and it wouldnt start but fuel is coming out of the cracked lines now. shot a little starting fluid and the truck fires up. ran fine for a little while, and again, its not wanting to start. if u start it with some fluid, it runs perfect, but when you shut it off, it wont start back up. any ideas? could it be a bad Relief valve on the rail?

 

I just had a hard start (especially when cold) that ended up being an injector.