funky stall/no start 02 4.4i

[Jroc]

So, the other day I was about a mile from the house and the x started misfiring under load, so I coasted it to a stop(it had about a quarter tank in it). It started back up, but it just misfired and died. On the next attempt, it would only run with my foot on the gas. Finally it wouldn't run at all, regardless of throttle input. I tried it with the maf unplugged, but that made no difference. I had it towed back to the house and began researching similar issues, here on this site. Previous experience had me thinking that it was probably a clogged fuel filter. I go outside to do a fuel pressure check at the rail and it starts up, runs fine, drives, with no misfires for about 10 minutes. I turn off the engine, to check the key-on rail pressure and its at about 15 pounds. Tried to start it again, but symptoms repeated and it wouldn't run. Rail pressure check returns a 9 pound reading. I relieve the pressure and it rises to 7, then to 4-5psi and has stayed there, with every subsequent check. Typically, I'd suspect the pump relay, pump or filter. I cant hear the pump turn on, but in retrospect I don't recall ever actually hearing it running, before. Also, the fact that it started the next day and ran perfectly for 10 minutes, is skewing my theories. Anyone have an experience like this one?

Update: fixed!