Originally Posted by Ram15002ndGen

There is something wrong with that gas tank. The 1500 have a 26 gallon gas tank, so I don't know what the heck you got going on there. I don't know if it's even possible to get that much sediment deposit to fill up such a large part of your tank.

Originally Posted by cmckenna

My 1500 has a 32 or 35g tank- can't recall but, it's very large on my truck. If your losing MPGs, it may be that you have a clogged / partially clogged CAT and / or muffler due to the blown plenum. It also could be partially clogged fuel injectors or restricted fuel injectors at the screen.

However, it would run poorly in that case. I just had this happen this past weekend in fact. Rust from the fuel rails clogged them. But, if yours is running fine, it's not the injectors and I would look into your air supply at the intake and the TB to your exhaust flow. Perhaps the computer does not have enough data to fine tune for performance yet. I cleared mine out before running and was told that it takes a while to obtain an avg of all the sensors before it tunes in.

Originally Posted by Sheriff420

going from 12 to 13 normally to 10 with a pontoon boat sounds right to me. that boat catches a lot of air going down the road, its like riding with a parachute behind you the whole time. and my 26 gallon tank normally has 4-6 gallons left in it when i hit 1/8th to 1/4 on the gauge so i bet you have a 26 gallon.
do you fill up then reset the miles then calculate miles by amount put into the tank every time you get gas? that's the best way to do it, and if you do that every time then you'll know if somethings going on if you all of a sudden get 8 mpg.

Originally Posted by 2damnyankee

ok i just looked up my original build sheet for my truck. It does have a 26 gal tank so either the gauge is not rite and i still have 6 gallons left in the tank when the gauge is on Empty.

now everytime i fill this thing it is always 20 gallons and ive had this truck for 11 yrs. now the fuel pump has been changed back in 98 and still the same one since. now i am woundering if is calibrated rite for the fuel gauge. now i will have to fill it again when i get it resting on the empty line. i have a little left but not much. Really dont like letting it get down that far but i want to see what i am getting from a full fill. and this time i will take pics before and after

Originally Posted by Ram15002ndGen

There is something wrong with that gas tank. The 1500 have a 26 gallon gas tank, so I don't know what the heck you got going on there. I don't know if it's even possible to get that much sediment deposit to fill up such a large part of your tank.

Originally Posted by jasonw

Hahns is definitely right about the gas gauge. Go by miles traveled divided by gallons put in. Plus the whole tires issue.

BTW...

Ram 1500s-
If you have a short bed and/or quad cab: 26 Gallon Tank
All others: 35 Gallon Tank

Ram 2500s/3500s-
If you have a short bed and/or quad cab: 34 Gallon Tank
All others: 35 Gallon Tank


2damnyankee, either your gas gauge is way, way off, or at some point in time your fuel tank was replaced and a previous owner went cheap, got the 26 gallon tank instead of the 35. Or worse, he got the 22 gallon tank from a 1994/1995/1996 Dodge Dakota of the same/similar model year.