Hard start no Power

[just stroking]

I have a 2002 f-350 with 189,000 miles on it. when the temperature drop here the truck would have a hard time starting and then when it does it had no power until it warmed-up or you drove for about a mile, then it runs and idles great. It starts and runs like it has run out of fuel. I took it to Ford and they said my motor was dusted and I needed a new motor. I took it to another shop and they say I need new injectors. I think I have a fuel problem either the fuel is draining back or maybe the lift pump is getting weak??? Any help or suggestion would be great. The glow plugs have been checked and a new relay installed. Also does anyone knows of a good PSD mechanic in Phoenix? This is my personal truck, I have 6 in my fleet all 7.3's.

Chuck in Phoenix