Howdy, i have a 2002 isb170 we recently overhauled with gapless rings from total seal, BBI stage 1 injectors for a "03/04 5.9 common rail" and a fass titanium 100, i am using to feed the gear pump on the cp3 then the output of the gear pump into the cp3 like oe style. i have wired the ecm and tcm up, with necessary battery power circuits grounds, and ignitions circuits, also wired in a data connector for cummins insite. my rail pressure seems to be good, crank and cam signal seem to be present, but the engine wont start it will fire about every second then crank, it repeats this cycle but wont catch and run. hoping there is a few of you that can help me. I feel the injector driver module is bad in the ecm. but there are not codes related to anything like that.