Pre- pump fuel line mod:
Parts:18" of 5/16" diesel rated fuel line and 4 hose clamps for fuel line. That's it. Available at NAPA, etc. for 4-5 dollars.
Procedure: Underneath truck, drivers side, about where footwell is, locate electric fuel pump sitting inside of frame rail. Remove quick connect fitting and hose from suction side of pump[the hose from pump to fuel tank]. Cut new hose to length and replace with hose clamps. Done. Most guys stretch hose over the small retainer collar and utilize 2 hose camps on pump end of hose, I just pushed mine up to the collar and used 1 hose clamp.
Why in the world would this do anything to help your truck run better?!! I was very skeptical at first, but now I'm a believer, you will be too if your truck is SUCKING AIR. It seemsthe quick connect fitting you have just tossed, while excellent as a positive pressure connection is less than ideal as a negative pressure connection allowing air to be pulled into the fuel system. This air entrained fuel can cause your truck to run louder, rougher, and inconsistent. I'm not saying all late model PSD's suffer from this, but my '01 did and I think many if not most will given enough time.
Give the fix a try....it's easy. Alot of people have re-done the fittings all the way to the fuel tank pick-up foot, reporting even more improvement. I'm not in the mood to drop my tank just yet, but I probably will in the near future and will post results. Take Care All - Berg