How long do lift pumps last and is a FASS worth it?

Clubbs

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Jun 15, 2008
Location
Blounts Creek
Put 262k miles on the Cummins. It's tuned and deleted, but otherwise the engine is stock. What's the consensus on in tank lift pump life?

Figure I got to be near the end of the factory pump's service life, and would rather be proactive instead of stranded somewhere with a dead pump. Are the FASS or similar lift pumps worth an upgrade over stock or is it marketing hype?

I'm sure it depends on if I add more power stuff so let's assume it will eventually get a bigger turbo and injectors when the factory ones give up, but not big enough to stack cp3's.
 
FWIW FASS and Air Dog are the same like Nitto and Toyo. What I’ve heard is the family (brothers) split ways prior to patents being situated and created FASS and Air Dog. What I do know is air dog has better customer service. Other than that IDK.

Also, been super happy with my Airdog 165 on my ‘98 12 valve. Gauge never even fluctuates when I’m cruising or in the throttle. Love the fact that it is constantly cycling the fuel through the filters to keep things clean.

Buy it and don’t look back.
 
I have an Air Dog on mine, which was already installed when I purchased it. I haven't had any issues with it. I like how easy the filters are to change but really don't like where they are on the outside of the frame rail. Thankfully I haven't had any issues with mine, but it is always in the back of my head. If I were looking to do a new lift pump myself I'd lean towards an in-tank style like Fleece's unit and then possibly some upgraded filters if you don't like the OE style.

Duane
 
Both good products by design, I have an older Fass95 on my 03, the hose that came with it was crap, i've since replumbed it, the appeal is the filter options/ serviceability on both Brands. I highly recommend Fleece, their products are excellently designed and thought out. I have a 52 Gallon S&B Midship tank and the "built" in sump to feed the lift pump has no baffles, no buckets, nothing, it's a void. I got quarter tank issues from it feeding into my liftpump. I now use a Fleece in tank sending unit that feeds into the Fass. Same sending unit as their in tank one with a pump minus the pump since i'm using an external liftpump. No issues.

The older Fass 95 I have claims to support upto 600 hp, they no longer make the 95. When I get tuning done i'd look to an Air Dog unit if my pump can't meet demand.

Customer Service, Quality Control, and after sale product support would be the factors to push me one way or the other.
 
i have a fass on my 2005 Duramax for 15 years now and not a min of problem out of it. I am still running the original injectors they are 20 years old. They claim it puts 99.9% pure fuel to the injectors no air and gives them longer life. I don't know anybody still running original injectors in their Duramax that old. My truck has 165.000+ miles now.
 
I can tell you that you won't get 260k out of either aftermarket pump in my experience. 1-150k has been my experience. If your running much of a tune you've probably already about reached the limits of a stock in tank pump. I remember a magazine article from years ago where a CR stock lift pump done like 20gph. So about anything is an upgrade. My dads 07 has approximately 430k on it currently and is still on stock pump.
 
2001 Dodge Ram CTD. The stock lift pump died in 2006. I installed a FASS pump. 19 years later and zero problems.
 
Buffy said:
I’ve used the Air Dog and it worked very well for me. What sold me on them was it eliminated the lift pump located on the block. When that lift pump silently goes out it eventually kills the injection pump, or so I was told.
Click to expand...
Yes it does. The diesel is the lube and cooling aspect of the injection pump. No fuel no lube or cooling= kaboom.
 
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