[NickBeek]

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.

 

[RC90]

Thanks Nick Ill try all that! How do I fill in my signature? I just looked Ha.

 

[Gundog 64]

Thanks Nick Ill try all that! How do I fill in my signature? I just looked Ha.

Go to the "User CP" near the top of the page. Click on it and the rest is easy.

John

 

[steelhead01]

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.

 

[RC90]

I'm headiing home now to try it!