Any FASS owners out there? - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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  #1  
Old 04-28-2013, 05:42 PM
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Any FASS owners out there?

Tossed out the AirDud and bought a FASS 200gph HD series. I'm working the bugs out, here's my problem. The pump takes 15-30 seconds to prime every single time I start the truck. I'm using a sump, not the ontop of tank setup that FASS provided, FASS said a sump is ok to use.

I noticed in the moring when I start my truck my pressure is at 70psi. After driving all day when I get home it usually 55psi. This is without me making any adjustments.

Sidenote- I'm using a driven diesel regulated return.
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Old 04-30-2013, 04:45 PM
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I'm stumped. This unit is seeming just as unreliable as an Airdog and I haven't even had it for a week.

I put a separate pressure gauge on the fass system. Sometimes its 90psi, sometimes its 50psi. So frustrated!

Two pumps, different brands now acting the same. Maybe its something else....
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Old 05-01-2013, 03:52 AM
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People were having problems with FASS long before Airdog. These pumps are basically of similar design and will have similar results. You may want to try feeding it with a stock 6.4 pump, that appears to have made Juggernaut's AD happy. Would probably work the same with your FASS.
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Old 05-01-2013, 06:20 AM
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Quote:
Originally Posted by WLDHRSE View Post
People were having problems with FASS long before Airdog. These pumps are basically of similar design and will have similar results. You may want to try feeding it with a stock 6.4 pump, that appears to have made Juggernaut's AD happy. Would probably work the same with your FASS.
Is the stock 6.4 pump better than the stock 6.0 pump? If so instead of me buying a fass or airdog, is a 6.4 pump just as good
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Old 05-01-2013, 06:45 AM
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Not sure if you really want to go with a 6.4 pump as it's not a huei system. Different fuel pressure requirements I believe. Can't say for sure though. For people that own 6.0 and 7.3's have better success with OEM pumps and if you need more fuel volume they tie in two OEM pumps in parallel and install an aftermarket fuel filter like a raycor or something

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Old 05-01-2013, 06:46 AM
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the 6.4 pump is a low pressure 8psi pump. I love my FASS....however mine is a low pressure pusher pump feeding my fuelab. i've had it for around 7 years with no problems. I first ran it feeding my stock pump.
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Old 05-01-2013, 07:31 AM
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You can use a 6.4 pump to feed another pump with but you can not use a 6.4 pump solely as your only lift pump. The 6.4 pump is a high volume low pressure pump, operates at 10 psi. It's no where near the psi needed for a 6.0 or 7.3 HEUI injection system. You would still need a lift pump capable or 60 psi or better. The issue with the AD or FASS on a 6.0/7.3 is they require constant high pressure which is hard on pumps.
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Old 05-01-2013, 07:35 AM
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Quote:
Originally Posted by Eric@PTP View Post
You can use a 6.4 pump to feed another pump with but you can not use a 6.4 pump solely as your only lift pump. The 6.4 pump is a high volume low pressure pump, operates at 10 psi. It's no where near the psi needed for a 6.0 or 7.3 HEUI injection system. You would still need a lift pump capable or 60 psi or better. The issue with the AD or FASS on a 6.0/7.3 is they require constant high pressure which is hard on pumps.
Is there a thread or a write up on using both pumps on the 6.0?
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Old 05-01-2013, 07:38 AM
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That I'm not sure of that, its possible though being there are a few members on here running that set up. You can use another pump such as a low pressure Fuelab as well.

Last edited by Eric@PTP; 05-01-2013 at 08:55 AM.
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  #10  
Old 05-01-2013, 08:41 AM
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Quote:
Originally Posted by Reezy71x View Post
Is there a thread or a write up on using both pumps on the 6.0?
6.4 lift pump and AD2 165 success!!!
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