need help not your normal injector pump problems! losing prime after rebuild
so i am at my wits end here! i am a new member long time lurker, altho not new to diesels. First the problem, I just rebuilt the motor for my project stock 1994 cummins 160 pump auto trans had 240 thous on it. Now it runs great idles revs sounds good but the problem is this, if you rev the motor up and let go of the throttle it dies and loses all pressure from the pump to the injectors once re bled will start and run great again no problem does it every time even warm. pump was not rebuilt just the motor was. ran fine before and after except now it dies every time you rev it up and let the throttle go. Even after you rev it up and it starts dying ( motor winding down without fuel) and i pump the throttle as its dying it still dies all the way. If you rev it up and slowly let it idle back down its fine just the quick let go of throttle does it. Fuel pump mods were only afc mods and 0 fuel plate oil feed line on outside of pump fuel rack mod.
truck has the following:
1. new mech lift pump
2. all lines are new
3. lines are in a fuel can strait to lift pump
4. shut off solenoid properly working
5. stock fuel filter arrangement all new lines
6. new overflow valve
7. lift pump holding 40psi at and after problem measured at p pump
8. cracked line at pump to verify gauge and 40 psi worth of fuel sprayed everywhere literately
the only thing i have not done is take the afc housing and the fuel plate off and try it without them but i don't see how ether could be effecting the fuel flow from the plungers to the injectors. anything on this would be so very helpful as i have done everything i can think of and still have the problem. i am going to try and take a video tomorrow after work but its not much to look at push throttle to the floor let go and it dies and wont start without re then runs fine bleed
Last edited by bowmans_army; 11-13-2014 at 09:21 PM.
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