Dodge Cummins Diesel Forum - View Single Post

motovate · 08-06-2008, 09:40 AM

I just read this thread (and a couple of more) and I am getting ready to go to a FASS pump on my 2002 with in tank lift pump that I think has either quit or is real weak - I think it might have been a factory LP replacement but it was on the truck when I got it. I also have an aux LP frame mounted between the tank and the Injection Pump wired direct to battery through a switch and a relay.

I have a few questions.

Is there any advantage to keeping the stock fuel filter in place - I know a lot of people by pass it. It seems like extra filtration and water seperation would be a good thing. Any down side to keeping it??

One thread seemed to say that the FASS is designed to let fuel bypass the pump but go through the FASS water seperator and fuel filter when the pump is not running.

Did I understand that correctly?? I want to keep the existing frame mounted LP as a spare and as a way to easily prime all filters after I have changed them out and if something happens to the FASS have a back up to continue on by just turning it on.

So if I put a"T"' in line from the tank to FASS pump line, run the main line to the FASS pump intake side and another to the aux intake side and another "T" from the aux exit to the Fass intake side(creating a loop) it should work to prime both the Fass Filters and the stock filter because it will let the aux push fuel through the FASS filters to the stock filter. Correct?? If I do this should I put in a shut off on each side of the aux LP to keep fuel from pushing through the aux when it is not running or does it matter??

Finally if I use the stock filter I just run the FASS exit line to the stock filter housing and up grade the line size/banjo bolts from the stock filter to the Injection Pump to ensure I'm getting plenty of fuel to the IP.

Am I tracking.

Thanks.

LBM

__________________
Wildland Fire Dispatcher, 2002 Dodge Ram 2500 2WD Cummins, CFM, K&N, 4" Exhaust, FASS, Edge w/Attitude, 99 MPG going downhill w/ no throttle!!!!

08-06-2008, 09:40 AM	#11 (permalink)
motovate Newbie Join Date: Mar 2008 Location: Ash Fork AZ Posts: 23 motovate's Truck Pics	I just read this thread (and a couple of more) and I am getting ready to go to a FASS pump on my 2002 with in tank lift pump that I think has either quit or is real weak - I think it might have been a factory LP replacement but it was on the truck when I got it. I also have an aux LP frame mounted between the tank and the Injection Pump wired direct to battery through a switch and a relay. I have a few questions. Is there any advantage to keeping the stock fuel filter in place - I know a lot of people by pass it. It seems like extra filtration and water seperation would be a good thing. Any down side to keeping it?? One thread seemed to say that the FASS is designed to let fuel bypass the pump but go through the FASS water seperator and fuel filter when the pump is not running. Did I understand that correctly?? I want to keep the existing frame mounted LP as a spare and as a way to easily prime all filters after I have changed them out and if something happens to the FASS have a back up to continue on by just turning it on. So if I put a"T"' in line from the tank to FASS pump line, run the main line to the FASS pump intake side and another to the aux intake side and another "T" from the aux exit to the Fass intake side(creating a loop) it should work to prime both the Fass Filters and the stock filter because it will let the aux push fuel through the FASS filters to the stock filter. Correct?? If I do this should I put in a shut off on each side of the aux LP to keep fuel from pushing through the aux when it is not running or does it matter?? Finally if I use the stock filter I just run the FASS exit line to the stock filter housing and up grade the line size/banjo bolts from the stock filter to the Injection Pump to ensure I'm getting plenty of fuel to the IP. Am I tracking. Thanks. LBM __________________ Wildland Fire Dispatcher, 2002 Dodge Ram 2500 2WD Cummins, CFM, K&N, 4" Exhaust, FASS, Edge w/Attitude, 99 MPG going downhill w/ no throttle!!!!