have the truck scanned for codes. Sounds also like you may have an air leak in fuel lines causing you to need to prime the system by bumping the lift pump.
Depending on your future horse power goals may be, i would suggest going with the FASS fuel pump, not the air dog. If it were me, I would look on this site for the pro's and con's to both fuel systems. I personally run a FASS on both of my 2nd gen rams. A cracked manifold can affect you boost not to mention its just annoying, however, the first thing on my list is always a FASS pump along with gauges (fuel, bost pyro). Once you have those installed, then add 50 to 100hp injectors, wire tap boxes (programmers) etc. I see you have a auto, so if you add larger injectors, you need to plan on updating your transmission as well. I am no expert, but have learned a lot from the dedicated members and experts on this site!Update: replacement ECM and replacement of fuel lines helped to remedy my problems. Now, some real work must begin. debating on where to start? airdog is definately on the list for sure but my exhaust manifold is cracked. which is more critical? also hoping to de-bug some of the wretched electronic controls, (O/D on off switch, blower motor speed control, etc.) At any rate, very happy to have my old girl goin again