Dodge Diesel/Cummins Mechanic Advice Needed

I had a crank sensor fail but the truck would still start and run in a degraded mode and set a code for it. If the vp44 is working well the fuel at the injectors will spray out vigorously when cracking the line. You said you had fuel at the injectors but did not say if sprayed hard or just dribbled out. The VP44 depends on fuel for lubrication and if you have had LP problems it is highly likely the diagphram in the pump mave have cracked and failed. I run pressure sensors on both sides of the filter and monitor it closely as you may well know the VP44's are not cheap.