rmalik1
Pittsburgh,Pa.
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Was at a Ford Dealer and was talking to the service guy about auxiliary fuel tanks I told him I was thinking about putting in one that dumped straight into the main fuel tank (not pumped in by computer like a transfer flow and not a transfer tank). Service guy said they had computer problems when using that type of aux tank?
Does that sound right?
Think OEM tank just knows how much diesel in it nothing else
Aux tank is made by Aluminum Tank Industries
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Golden_HVAC
Fulltime, CA, USA
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Hi,
It used to be legal to have gravity flow into the main tank, but it has been against federal laws for many years now.
Ford must make sure that no more than 10 grams of fuel can evaporate from the fuel tank per 24 hours after 2005 model year, and even stopped installing a fuel return line, so that warm fuel was not recirculated back into the tank.
I don't think you will find a certified axillary fuel tank for a gasoline vehicle made after 2005. Yes they still make them for diesels.
Transfer Flow has all the Federal regulations on their website, you can look them up.
Fred.
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Huntindog
phoenix arizona USA
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Golden_HVAC wrote:Hi,
It used to be legal to have gravity flow into the main tank, but it has been against federal laws for many years now.
Ford must make sure that no more than 10 grams of fuel can evaporate from the fuel tank per 24 hours after 2005 model year, and even stopped installing a fuel return line, so that warm fuel was not recirculated back into the tank.
I don't think you will find a certified axillary fuel tank for a gasoline vehicle made after 2005. Yes they still make them for diesels.
Transfer Flow has all the Federal regulations on their website, you can look them up.
Fred.
This is not a problem for him. He has a diesel.
To the OP. I know that Ford has programming for the 2011-12s for this. I don't remember the details on it. I don't know about prior years.
Huntindog
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Farmer David
Mattoon, ILL.
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I have a RDS tank in a 2011 ford with gravity feed, has caused no problems I like the tank. But I had same tank in a 2007 Chevy before this truck and if I had the valve turned on for a long time with fuel in both tanks it would cause the fuel gauge to go nuts and read empty. It would go back to working right after I shut of valve from aux. tank.
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lawnspecialties
Garner, NC
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I have a 90 gallon RDS tank from Northern Tool in my '11 F450. It was installed by my Ford dealer two months ago.
The only computer problems it has created is making things like "miles to empty" confused. Its gravity fed and works great. The gauge just keeps reading full until the big tank empties. I also have a small ball valve right where the fuel line exits the RDS tank so if I ever need to stop flow from the tank, its an easy turn of the handle.
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OldGreaser
South Texas
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I have a 65 gallon Titan replacement tank between the rails on my 2011 F350. Titan sent me a software patch to address miles to empty and said Ford could load it for me but I haven't had it done. I found that leaving the setting on 'not' towing makes the miles to empty somewhat reasonable. It hasn't been a problem at all. The only downside to the replacement tank is that it's a lot more money. You can do gravity feed for less than half of the $1500 I paid.
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RGordon
Atoka, TN/North Ft Myers, FL
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My 60 gallon RDS gravity tank will throw a check engine code if I continue to let the aux tank drain without gas gauge movement, especially if I turn engine on and off. It senses a fuel gauge failure. If I use the manual valve controlling how much I put in, it will work like a champ. One of the best things I have even done to my F350. It is an easy installation and only took me about 30 minutes. It only hurts when I have to fill it up!!!!
Ron & Libby Gordon
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SoCalDesertRider
SanDiego, CA, USA
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A completely separate tank with a transfer pump would eliminate all of the computer and gauge problems. Fill both tanks, run the truck tank near empty, pull off the road, fill the truck tank from the aux tank and continue on your way.
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lawnspecialties
Garner, NC
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SoCalDesertRider wrote:A completely separate tank with a transfer pump would eliminate all of the computer and gauge problems. Fill both tanks, run the truck tank near empty, pull off the road, fill the truck tank from the aux tank and continue on your way.
.....or a gravity fill setup with a ball valve in the line. Far cheaper.
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Perrysburg Dodgeboy
Perrysburg, Ohio USA
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Don't they make true aux fuel tanks anymore? I installed a 100+ gal tank in my Dads 91 D-350 that even had a fuel gauge sender. Was set up like Fords aux tanks in that you switched from one tank to the other.
Was not a big deal to instal and you didn't need to stop to "transfer" fuel from one tank to the other. Never understood the whole transfer thing myself. 
Don
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