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  #1  
Old December 18th, 2014, 04:01 PM
Rover110
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Steve
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Gas quantity question

So my 110 is supposed to have a 20.4 gallon tank.
I can run it out of gas and it takes 16 gallons at the pump.
If I go to 220 miles and the light is long on it takes 16 gallons.
Where is the missing 4.4 gallons? I would like to be getting more mileage per tank.
Anyone have any incite?
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  #2  
Old December 18th, 2014, 04:07 PM
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I'm not sure on the 16 gallons thing, but beware that consistently running your tank low will put additional stress on your fuel pump.
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  #3  
Old December 18th, 2014, 04:09 PM
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thomas
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When you say run out of gas, what do you mean? Also running a tank low all the time is not good for the truck.
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  #4  
Old December 18th, 2014, 04:17 PM
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mark kellgren
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maybe your pickup tube in the tank is bent or out of position.
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  #5  
Old December 18th, 2014, 04:21 PM
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Greg Chin Sr
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Might be the wrong pick up for the tank. I would take it out, and replace it. Fuel pump are cooled by the flow of fuel, lack of will kill the pump as mentioned before.
Greg
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  #6  
Old December 18th, 2014, 06:44 PM
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Robert Davis
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If it were mine, I would run it out of gas and then drop the tank.
You will be able to gauge by the weight of the tank how much fuel is left inside, once you remove the sender and then check the pickup you'll be able to gauge what is happening to understand why you're only using part of the tank volume.
Then you'll be able to fix it proper like.
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  #7  
Old December 18th, 2014, 06:44 PM
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Tom, I dont run it low as a rule. But I have run out of gas and have an idea at what mileage to pull in. But it always seem to need the same amount whether I run out or get close.
Thanks all I will check your suggestions tomorrow.
Is the pickup tube part of the pump assembly? I have had to replace pump 3 times in 4 years which seems odd to me.
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  #8  
Old December 18th, 2014, 07:08 PM
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Quote:
Originally Posted by Rover110 View Post
Tom, I dont run it low as a rule. But I have run out of gas and have an idea at what mileage to pull in. But it always seem to need the same amount whether I run out or get close.
Thanks all I will check your suggestions tomorrow.
Is the pickup tube part of the pump assembly? I have had to replace pump 3 times in 4 years which seems odd to me.
Yeah, there's definitely an issue there. We definitely get more fuel in the tank when it runs low on longer trips and have never run it out of gas, so it sounds like there's a mismatch of some pick-up parts there. That's probably why it's eating the pumps! Is it still the original tank?
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  #9  
Old December 18th, 2014, 09:19 PM
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Original tank but not pump. How many miles do you get to the tank?
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  #10  
Old December 21st, 2014, 09:37 PM
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We usually average 15-16mpg with mosly highway driving...so we'd have about 240 miles on a typical run with burning about 16 gal and having 4 left. I guess with that math we'd get a little over 300 miles before empty. Did you have any luck figuring out the issue?
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  #11  
Old December 21st, 2014, 09:43 PM
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I'm out of town for the holidays. Will look into it when I get back home. I'm lucky to get 220 before running out. I usually pull in at 210. Hate pushing that thing.


Quote:
Originally Posted by SonnyAK View Post
We usually average 15-16mpg with mosly highway driving...so we'd have about 240 miles on a typical run with burning about 16 gal and having 4 left. I guess with that math we'd get a little over 300 miles before empty. Did you have any luck figuring out the issue?
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  #12  
Old December 22nd, 2014, 10:43 AM
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Weighting the tank might be a pain, if it's a 110 there's a drain plug. Just undo the bolt and put a pan so you can measure the rest of gas. No need to undo the tank itself. Dunno if there's such a thing on a 90 but my guess is probably !
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  #13  
Old December 22nd, 2014, 01:20 PM
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210 miles, that about as far as a NAS D90 will go to on a full tank.
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  #14  
Old December 22nd, 2014, 01:22 PM
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Quote:
Originally Posted by CDNRover View Post
Weighting the tank might be a pain, if it's a 110 there's a drain plug. Just undo the bolt and put a pan so you can measure the rest of gas. No need to undo the tank itself. Dunno if there's such a thing on a 90 but my guess is probably !
My Row 90 with under seat tank has a drain plug
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  #15  
Old December 22nd, 2014, 02:18 PM
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I don't dare risk going over 175 miles without adding fuel...it's a good thing cause I'm old and tend to need more potty breaks...
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  #16  
Old December 22nd, 2014, 06:07 PM
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Are the NAS tanks different than RWO 110s? Normal 110s have the same tank as a RRC. 18 imperial gallons which is 21.6 US gallons. Does it have a drain like the "normal" ones (as mentioned above). If so, drain it right out and then measure as you fill.

I can get an easy 650 miles out of my 90. I have around 29 gallons capacity.
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  #17  
Old December 22nd, 2014, 06:14 PM
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Quote:
Originally Posted by Red90 View Post
I have around 29 gallons capacity.
Do you have a side tank and a rear tank?
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  #18  
Old December 22nd, 2014, 06:15 PM
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The NAS tanks only hold maybe, 16 gallons. It is located between the frame & behind the rear axle. It's plastic & protected by a removable steel skid plate which actually supports the tank.
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  #19  
Old December 22nd, 2014, 06:18 PM
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Quote:
Originally Posted by Viton View Post
The NAS tanks only hold maybe, 16 gallons. It is located between the frame & behind the rear axle. It's plastic & protected by a removable steel skid plate which actually supports the tank.
That is the location of all 110 tanks. I wonder why they would have put in a smaller tank. The normal one does not take up all of the room

Also the later ones (from TD5?) are plastic and 18 UK gallons as well.
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  #20  
Old December 22nd, 2014, 06:33 PM
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Quote:
Originally Posted by Red90 View Post
That is the location of all 110 tanks. I wonder why they would have put in a smaller tank. The normal one does not take up all of the room

Also the later ones (from TD5?) are plastic and 18 UK gallons as well.
Again US gallon is about 20% smaller (3.8 to 4.54 liters) than the UK gallon.

The smaller tank in the 90 v 110 is simply because the space behind the rear axle is less. Compare overhangs and you'll understand.
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