SOS 2250 just died suddenly

[Lonestar10]

well 0 FP on high side during cranking there's either air in system, fuel pump died "which means its catastrophic to the fuel system and engine", or some part of the system isnt allowing fuel to the high pressure pump.

How many miles on engine? if mileage is above 300k was the high pressure fuel pump replaced/rebuilt? if you find smorgans post you can see just how fast the fuel pump can expire and damage it can do.

Check fuel filters ensure they are tight and that company that did PM didnt loose an oring installing the filter. my dad had that at sap bros PM done and went down the road with his cm870 shooting fuel out all over the truck due to an oring missing on fuel filter attached below solenoids.

if you have a davco make sure there's fuel in it also make sure its tightened down and sealed properly on the bottom ring seal and on the twisty cap on the top. if there is no fuel in davco there's either a restriction from tanks to davco or there is a bad seal so it cannot create a vacuum to pull more fuel into it.

I dont know if theres any quick roadside checks you can do to verify the HPressure fuel pump on the side of the road to see if it died as im not experienced with 2250-2350/X15 applications using this terrible design.

Possibly see if your engine has a manual primer pump usally something near the fuel system that you unscrew a bit and it pops out allowing you to push it in and out to manually pump fuel. most reefer units use this same type of pump incase they run out of fuel if that helps identify what im talking about. this might get some pressure into the system to see if it will start.

bout all i can currently come up with off the top of my head.