Aux fuel tank question

jliveit · 07-23-2008, 07:15 PM

Just ordered a RDS Aux. fuel tank with the gravity feed install kit and wanting to know if anyone can tell me if the valve is left on to keep the main tank full will the computer cause the truck to throw a code or worse yet shut down due to driving alot of miles and not using any fuel from the main tank that is being fed by the Aux. tank? This is on a 07 1/2 with the 6.7. In other word if the truck goes 300 miles and the main tank is still full how will the computer react?

99BigRed · 07-23-2008, 08:43 PM

It will spend alot of time scratchin it's head.

__________________
99 Quad RED 3500 SLT Laramie, 53 block, 5 spd, 4x4, Pacbrake, 4" exhaust, Edge Comp, K&N filter, Autometer Pyro and Boost, Transfer Flow 54 gal tank, ProTech Rack, Alcoa Hot Shot wheels and Full Kenwood tunes.

zigfreed · 07-23-2008, 11:36 PM

I think it looks at fuel flow rate to determine mileage. I do not think that it looks at the amount of fuel in the tank.

__________________
2007.5; 6.7;6 speed auto; Laramie; Mega Cab;4X4;3500;Pullrite 24k; Stock until I am out of Warranty.
2008 Heartland Razor 3212sb

whiteelephant · 07-24-2008, 05:16 AM

We just got back from a 5000 mile trip with the valve open. It never threw any codes.

__________________
2007.5 Dodge RAM 3500 4WD DUALLY 6SPD AUTO, LARIME, Firestone BAGS
2008 Cyclone 4012, Mor-Ryde pin box, RDS Auxiliary Fuel Tank/Tool box combo.

jliveit · 07-24-2008, 07:02 PM

Thanks for the replies

***elephantrider*** · 07-24-2008, 07:09 PM

Quote:

Originally Posted by whiteelephant

We just got back from a 5000 mile trip with the valve open. It never threw any codes.

where you at in tx ?

__________________
04.5 325 hp 6sp qclb - cipa mirrors -
b&w tob - airbags - edge ez EZD1000D - cat with pipe ( for hot stuff ) - isspros -

http://s303.photobucket.com/albums/n...antrider_2008/

whiteelephant · 07-24-2008, 07:26 PM

Quote:

Originally Posted by elephantrider

where you at in tx ?

Bedford...Right smack dab in the middle Dallas and Fort Worth.

__________________
2007.5 Dodge RAM 3500 4WD DUALLY 6SPD AUTO, LARIME, Firestone BAGS
2008 Cyclone 4012, Mor-Ryde pin box, RDS Auxiliary Fuel Tank/Tool box combo.

MtnTrucker · 07-25-2008, 12:02 PM

I replaced my stock fuel tank with a 65 gallon unit. The gauge never moves off of full until you've driven 300-350 miles and get down to 34 gallons, same as stock. Then it goes down at the same rate it did with the stock tank from there on. It's never given a CEL related to the fuel tank.

It sure is nice to be able drive past the fuel stations in the Yukon selling diesel for $6.65 a gallon knowing there is $5.00 fuel 200 miles further up the road.

__________________
2007.5 2500 QC 4x4 6.7L, 6 spd auto, 3.73 gears, Westin Brush Guard, 2" level kit, rear air suspension, 65 gal Aero fuel tank, Commander gauge set, RedsBeds toolbox/tonneau cover,Franktown, CO

07-23-2008, 07:15 PM	#1 (permalink)
jliveit Cummins Fan Join Date: Dec 2007 Location: Ohio Posts: 33 jliveit's Truck Pics	Aux fuel tank question Just ordered a RDS Aux. fuel tank with the gravity feed install kit and wanting to know if anyone can tell me if the valve is left on to keep the main tank full will the computer cause the truck to throw a code or worse yet shut down due to driving alot of miles and not using any fuel from the main tank that is being fed by the Aux. tank? This is on a 07 1/2 with the 6.7. In other word if the truck goes 300 miles and the main tank is still full how will the computer react?

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07-23-2008, 08:43 PM	#2 (permalink)
99BigRed Newbie Join Date: Jul 2008 Posts: 14 99BigRed's Truck Pics	It will spend alot of time scratchin it's head. __________________ 99 Quad RED 3500 SLT Laramie, 53 block, 5 spd, 4x4, Pacbrake, 4" exhaust, Edge Comp, K&N filter, Autometer Pyro and Boost, Transfer Flow 54 gal tank, ProTech Rack, Alcoa Hot Shot wheels and Full Kenwood tunes.

07-23-2008, 11:36 PM	#3 (permalink)
zigfreed Cummins Fan Join Date: Apr 2008 Location: AZ Posts: 85 zigfreed's Truck Pics	I think it looks at fuel flow rate to determine mileage. I do not think that it looks at the amount of fuel in the tank. __________________ 2007.5; 6.7;6 speed auto; Laramie; Mega Cab;4X4;3500;Pullrite 24k; Stock until I am out of Warranty. 2008 Heartland Razor 3212sb

07-24-2008, 05:16 AM	#4 (permalink)
whiteelephant Newbie Join Date: Mar 2008 Location: Texas Posts: 9 whiteelephant's Truck Pics	We just got back from a 5000 mile trip with the valve open. It never threw any codes. __________________ 2007.5 Dodge RAM 3500 4WD DUALLY 6SPD AUTO, LARIME, Firestone BAGS 2008 Cyclone 4012, Mor-Ryde pin box, RDS Auxiliary Fuel Tank/Tool box combo.

07-24-2008, 07:02 PM	#5 (permalink)
jliveit Cummins Fan Join Date: Dec 2007 Location: Ohio Posts: 33 jliveit's Truck Pics	Thanks for the replies

07-25-2008, 12:02 PM	#8 (permalink)
MtnTrucker Cummins Fanatic Join Date: Nov 2007 Location: Franktown, CO Posts: 149 MtnTrucker's Truck Pics	I replaced my stock fuel tank with a 65 gallon unit. The gauge never moves off of full until you've driven 300-350 miles and get down to 34 gallons, same as stock. Then it goes down at the same rate it did with the stock tank from there on. It's never given a CEL related to the fuel tank. It sure is nice to be able drive past the fuel stations in the Yukon selling diesel for $6.65 a gallon knowing there is $5.00 fuel 200 miles further up the road. __________________ 2007.5 2500 QC 4x4 6.7L, 6 spd auto, 3.73 gears, Westin Brush Guard, 2" level kit, rear air suspension, 65 gal Aero fuel tank, Commander gauge set, RedsBeds toolbox/tonneau cover,Franktown, CO