FASS pickup tube / fuel starvation - fix?

[WOT]

The FASS gives me great fuel pressure, but if I only have a 1/4 tank of fuel or less the FASS is starved when I hit the brakes to stop. Once stopped the fuel pressure comes back up. It seems that all the fuel goes to the front of the tank when you stop since there is no sump for the fuel to sit in. Has anybody found a decent fix for this? I thought about using the factory pickup/return (cup) but didn't think that would be sufficient in size.



Also, does anyone know if running w/o fuel for 5 seconds or so (time it takes for the pressure to come back up) will eventually damage the FASS?



Thanks,

WOT

 

[DCreed]

read thread " leaking FASS "

 

[WOT]

Its a FASS 150. I installed a 3/8" stainless pickup per the FASS instructions. It is located just to the rear and right (passenger side) of the factory fuel pump/fuel level sending unit. The tub is actually very close to the indentation that in the tank to locate the factory fuel puck/module.

 

[DCreed]

" LEAKING FASS " is in the PRODUCT/ACCESSORY FORUM.

 

[rweis]

There is a thread on building a sump. I do not remember what the final outcome was though. I think puting a sump in the OEM tank would be "exciting". If anyone wants to try, I am going to have a spare '02 tank shortly. Part of the problem with puting in a sump in the OEM tank is it hanging down lower and maybe vulnerable to damage, which would be very "not good".



I often thought about a sump outside of the tank, like a "day tank" in industry. A simple 5 gallon dirt track tank in the bed that feeds the engine with an lp, and is fed from an lp in the OEM tank with the DrawStraw. It would act like a buffer so the engine always sees fuel regardless of what is happening in the OEM tank. A few seconds of "no fuel" in the OEM tank, so what?, the 5 gallon "sump" still has good fuel supply to the engine.



I put an aux bed tank (50 gallons) in and feed the OEM down to 1/4 then refuel (generally 68 gallons or so, 1100 miles empty, 750 miles towing). Same principle though, the OEM tank becomes the "day tank". I do it this way because of the OEM gauge in the "day" tank.



Anything that would hold x minutes of engine run time and guarantee fuel to the engine.



Bob Weis

 

[WOT]

I suppose an in bed tank might end up being the best solution and maybe the cheapest depending on how much time I spend fooling around with other options



Time to noodle on it a bit and see if I can find some working grey matter to target with the next beer. :-laf