Originally Posted by mturner
if I use the manual primer pump I can get it started and keep it running as long as I keep priming it. Does this sound like the injector fuel pump is bad,
No, not really. It sounds like you've got air being introduced into the fuel system. If it were the high pressure pump, the injectors would not be able to operate the engine with insufficient pressure. I suspect that when you're operating the priming pump, your putting positive fuel pressure into the line, albeit very low, so that air can not be introduced downstream into the line.
Before replacing the high press. pump, I'd suggest starting at the priming pump and checking all fuel line connections to the high pressure pump for security. Having said that, I have to tell you I'm no RV diesel professional but know from working on sailboat diesels, that all diesels hate AIR! The principles are the same.
In addition to loose fuel line fittings, I'd also suggest looking for any fuel line chaffing that may have caused a small pin hole, allowing air to be introduced as well... Be very interested in what you find. Good luck! Bob