So long story short, rebuilt the motor top to bottom and has been running great then all of sudden it died and wouldn't start. So trying to diagnose what the issue is. I made up an electric fuel system for it with a gauge so I know it's getting fuel, but I noticed that it went from 70 psi when I would turn the pump on to now 90psi when I turn the pump on. But it has fuel pressure, checked all fuses and relays everything checks out there. Ohmed out the valve cover gaskets, everything good there. Checked for power to the injector harnesses while cranking, the had power. The tach moves when cranking so cps is good. When I rebuilt the motor I put a new ipr on it but it ran fine before. Over the 2 years or So I've owned the truck if put 2 or 3 cop sensors on it, and the one on it is still relatively new, So I'm thinking it would have to be hpop related at this point if it's not I don't know what it could be. Any input is appreciated.