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Discussion Starter #1
i am trying to figure out if my lift pump has gone bad, i dont really know a lot about diesels but want to learn, my truck wont start and i pulled out my fuel filter drained the fuel from it and then bumped the ignition to see if it will fill back up, tried three times and nothing, i was also wandering what would be the best route to go if i bought a lift pump
 

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I put a 150/150 FASS pump on mine and love it. Filter changes are easy as screw off/screw on. They will also support the higher hp levels you want to get in the future:thumbsup. A bit :$::$: but worth it in my opinion. Do it once, do it right.
 

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Yeah the 03-04 lift pumps are just as bad as the lift pumps on the 24v IMHO but the pump will just shut off when it senses pressure that is too low. Fass, airdog, walbro, wicked diesels...they are all good choices. I love my FASS HPFP.
 

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Discussion Starter #4
is the lift pump on the back of the fuel filter housing, i looked there and no pump, is it somewhere else, or could it be in the tank
 

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is the lift pump on the back of the fuel filter housing, i looked there and no pump, is it somewhere else, or could it be in the tank
Did you buy the truck new? If not, it is very possible that the prior owner had the lp replaced to the newer intank model.
 

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sorry to hijack, but from what I read my 05 should've come with the in-tank LP right? Should I be worried about replacing it?? I'd rather do it now and not worry about it...

The truck is stock, and, with the exception of intake and maybe exhaust, it will stay stock.
 

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sorry to hijack, but from what I read my 05 should've come with the in-tank LP right? Should I be worried about replacing it?? I'd rather do it now and not worry about it...

The truck is stock, and, with the exception of intake and maybe exhaust, it will stay stock.
No the stock pumps are the 05+ are much more reliable and you should not have to worry about it for a while. I had one crap out on me but it was a rarity, usually they are pretty good.:thumbsup
 

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so if anything, just replace it with another stocker when the time comes?
 

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so if anything, just replace it with another stocker when the time comes?
I dunno about that cause I noticed a nice bump in power when I replaced my intank stocker with a fass. Once you are draining your fuel pressure consistently then a fass or walbro or eliminator or airdog would be a good idea.
 

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I dunno about that cause I noticed a nice bump in power when I replaced my intank stocker with a fass. Once you are draining your fuel pressure consistently then a fass or walbro or eliminator or airdog would be a good idea.
fass and walbro are names that im familiar with...haha do they make the in-tank style pump?
 

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Discussion Starter #12
hey guys thanks, yeah it was bought used so my guess is they had an in tank pump installed, how hard would it be to get that out and put on a fass it got to get this thing runnin its been down since june of last year
 

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No the stock pumps are the 05+ are much more reliable and you should not have to worry about it for a while. I had one crap out on me but it was a rarity, usually they are pretty good.:thumbsup
Would an 04.5 325/600 have the same "more reliable" pump?

Other than listening for it when I turn the key on every morning, what would be a good way to monitor it? I heard if it goes out I could destroy my CP3 and be out lots of $$$$.

Thanks
 

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Would an 04.5 325/600 have the same "more reliable" pump?

Other than listening for it when I turn the key on every morning, what would be a good way to monitor it? I heard if it goes out I could destroy my CP3 and be out lots of $$$$.

Thanks
I think most 04.5 have the crappy filter mounted pump. A fuel pressure gauge will help the cause to see if the LP is failing. The nice part about the cp3 is if it does not get the pressure that is should it will shut the truck down so it does not totally grenade...kinda bites on a highway off ramp.
 

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id go with a fass, the 95 gph adjustible one would be great for you, alos get a low pressure light kit from a plcae like BD power. THe sensor will trip a light you mount in your dash to alert you if pressure drops below 5 psi, works great.
 

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Discussion Starter #16
thanks guys yeah i had a buddy come over to help determine if it was the pump and hes ordering me an airdog tomorrow i appreciate all the help though
 

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Bio and WVO fuels can be higher viscosity. Much harder to pump through filters and during cold weather.

A Walbro GSL 392 has superior pressure capabilities for pushing said fuel. Its pressure that matters, not flow. And the Walbro has tons of flow too.
 

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Bio and WVO fuels can be higher viscosity. Much harder to pump through filters and during cold weather.

A Walbro GSL 392 has superior pressure capabilities for pushing said fuel. Its pressure that matters, not flow. And the Walbro has tons of flow too.
:thumbsup

http://www.cumminsforum.com/forum/3...o-gfs-392-install-pics-allot-information.html

I'm actually of the opinion the Walbro is a superior platform to anything else out there.
But, that's just my opinion.
 
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