Originally Posted by JohnRR
[I know nothing about the common rail engines , but I'm willing to learn in case I decide to swap my VP44 pumped 98 24V over.

What builds that rail pressure , a lift pump , assuming it has one , or the Common rail CP pump , that may be your issue ?


The lift pump supplies fuel to the CP, The CP is what makes rail pressure. In my case, the rail pressure is slow to build up the pressure the ECU needs to see to fire the injectors. As soon as it hits 1.5kpsia it starts instantly.

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