Ok I'm stumped!

[Lowdown89]

Hey guys I posted this over on the .org but after 37 views I didn't get any answers so I figured I would ask here

Ok guys here goes My 01 f350 is having a problem starting, if I let the truck sit overnight and go to start it I turn the key wait for the WTS light to go off and try to fire it up usually it fires right up but if you don't rev it a few times as soon as you start it it will cut off and it takes quite a few tries of cranking to get it to start back... Well the past few days when I go to start it, it's getting harder and harder to start. Well after you start it the truck runs rough for maybe 30 secs then it smooths out, now after it starts and warms up you can cut the truck off and it will fire right back up. Tonight I started the truck up and it ran for maybe 20 secs and cut off and it took me around 5 minutes to get it to start well once it started I drove it about for about 10 minutes and cut the truck off and let it sit for about 5 minutes and it took a while to crank but once it did it ran fine, now Over the past year and half I have rebuilt the IPR(but havnt replaced it), installed a new ICP sensor, new CPS, recently changed the fuel filter, and installed new glow plug relay, 2 years ago I replaced the injectors and glow plugs and under valve cover harness. I'm just at a loss, could it be my hpop going bad? Weak fuel pump? I just really wanna be able to get in this thing and have it start every time like it should