Dodge Diesel/Cummins Mechanic Advice Needed

Sounds like you're getting fuel to the injectors, and you are correct, fuel only comes out of the injector tubes when cranking. Your high pressure pump is engine driven. I have seen many crank sensors go bad on these, and also fuel injector harnesses (which is internal to the valve cover gasket). But usually these will trip codes. Hope your ECU is good !