Have you checked the tin nut on the IPR? Keep working through that flowchart and let us know where you end up.
Cranking you may only see about 20 PSI of fuel pressure, which should be more than sufficient to get it to start.
"Just a redneck geek"
1997 F-350 7.3 PSD, 4x4, CCLB SRW, 3.55's, ZF5
If it isn't under warranty, I'll fix it myself.