ferm, I need help

[spareparts]

Its a 95 4.0 HO. I can't remember exactly what the fuel pressure was, but it was higher than I thought it would be, 50 lbs?. The problem showed up before I replaced the pump, I replaced the pump figureing it was the problem. It will run good for a while, then start acting up. I can shut the key off, let it sit for a few miniutes, crank it back up and it will run good for a few nmiles, then act up again. I swear it sounds like a blockage. The fuel pump will reach fuel pressure, when it starts acting up, the pressure drops, I can feather the throttle while watching the fuel pressure gauge(had it tied to the windshiled wiper) and I can get it up to speed sometimes, just incresing the throttle little by little, looking for the guage to drop. I could never get it above 55 without it lean popping(I think that is what was causing the codes). I seems to be a volume issues rather than a pressure issue. I'm going to replace the rubber fule lines, blow the steel lines out. Drop the tank and make sure I put the pump in correctly.