I have a FASS lift pump since Sept 2009. Never had an issue so far. Last week while returning from a 1200 mile trip, it appears the lift pump quit running and the truck lost power but still ran barely.
I changed the fuel filter (appeared OK), cleaned the air filter (it was real dirty) and added a 100 gal qty of Diesel Clean to the 35 gal tank (hopeing to clean any gunk out).
It ran good for a while (a day and a half) then started again. I pulled off the side of the road and this is when I realized the lift pump seem not to be running (while still idleing). The pump was almost too hot to the touch. I set on the side of the road for an hour with engine off (attempting to cool off the pump). It ran fine until the next day (about 400 mi) it started again. I pulled over and turned the engine off for about 30 seconds. Started up and it ran fine all the way home (about 50 mi).
I have talked with FASS and they suggested some testing to be sure it is the pump. The amount of fuel in tank makes no difference, the towing weight makes no difference, I have connected a by-pass direct power line to the pump for the next time it quits. They suggested it may be the computer limiting the amount of volts to the pump. Haven't tested this as of now.
One common thing is every time it quits, it is close or above 100 degrees outside.
So here I am looking for help again, wondering if anyone has experianced this before.
I did learn that the CP3 pump will pull through the FASS pump enough to drive.
I appreciate any and all your comments, suggestions or remarks.
Thanks
I changed the fuel filter (appeared OK), cleaned the air filter (it was real dirty) and added a 100 gal qty of Diesel Clean to the 35 gal tank (hopeing to clean any gunk out).
It ran good for a while (a day and a half) then started again. I pulled off the side of the road and this is when I realized the lift pump seem not to be running (while still idleing). The pump was almost too hot to the touch. I set on the side of the road for an hour with engine off (attempting to cool off the pump). It ran fine until the next day (about 400 mi) it started again. I pulled over and turned the engine off for about 30 seconds. Started up and it ran fine all the way home (about 50 mi).
I have talked with FASS and they suggested some testing to be sure it is the pump. The amount of fuel in tank makes no difference, the towing weight makes no difference, I have connected a by-pass direct power line to the pump for the next time it quits. They suggested it may be the computer limiting the amount of volts to the pump. Haven't tested this as of now.
One common thing is every time it quits, it is close or above 100 degrees outside.

So here I am looking for help again, wondering if anyone has experianced this before.
I did learn that the CP3 pump will pull through the FASS pump enough to drive.
I appreciate any and all your comments, suggestions or remarks.
Thanks