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In Tank Lift Pump!

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I have asked a few questions about my truck not starting and I cleaned up all the grid heater connections and grounds I even have 2 brand new interstate batteries. I here the fuel pump in the tank running its really loud?How long does it run once I turn the switch on? I have a bully dog and a few other things but none of its hooked up! I really hope its not injectors and I dont know the life on them! This is my first diesel but I can do mechanic work so is it possible for me to check rail pressure if so how?
Thanks guys:confused013:
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The lift pump will only run for a couple seconds if you just turn the key on, unless the grid heaters are cycling then it stays on longer. You can make the lift pump stay on for 20 seconds by turning the key to the on position then bumping the starter (not trying to start) and leaving the key in the on position. It would help get you answers if you would fill out your signature so that people know what year and mods you truck has.
 
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Discussion Starter · #3 ·
Thanks Nick Ill try all that! How do I fill in my signature? I just looked Ha.
 

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is that extra LOUD lift pump with a half tank or more of fuel on board?
they should be almost quiet.
they use the diesel to cool themselves. running at less than an 1/8th tank all the time is guaranteed LP burn up.

how many hours/miles on the fuel filter?

take the top off the filter cannister and remove the filter, any water in the bottom of the housing?
with the filter out, have someone bump the key/starter to turn the pump on for 30 secs. the fuel cannister should fill in less than 5 seconds.
if not, bad LP.
make sure your helper has quick reactions when you yell to him to turn the key off, healthy pump will hose your engine in diesel.

if it passes these tests, then rail pressure and injector problems

every Cummins 5.9 HPCR in Georgia should start year around without the grid heater. not needed until temps below 0d F.
 

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Discussion Starter · #6 ·
I'm headiing home now to try it!
 
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