gas guage says losing gas quickly (guage is correct...now a mileage problem)

[cobradcab6]

filled up with gas today and then came home, left again an hour later and the gas guage says i'm already halfway between full and three quarters. it does move some as i drive depending on if the truck is level, which is normal. but it seems to move a little extra or maybe i'm noticing it more since i'm worried i'm losing gas some how. there isn't any evidence of a leak under the truck or around the tank, and i don't smell any gas in the area, but the guage now reads just above three quarters so its definitely dropped more than just the normal movement from being unlevel. is there a way to tell if my float is stuck? what else could be wrong? any and all suggestions much appreciated. wanna get this figured out asap, not rich enough to afford to be losing gas

[YotaFun]

Odd quwstion, bust did you install any aftermarket lights laltly?

I had the same problem, dude to a losse ground somewhere, every time I turned off my lights my gas gauge would drop.

Just a thought.

[Seanz0rz]

the last 6 months or so ive noticed if i pull the filler nozzle out when it first clicks off, im not actually full. i let it drain into the tank and then click it again till it stops, this usually gets me to full. just an idea to throw out there.

[cobradcab6]

i haven't installed anything, but i may have some wiring still ran from lights in uninstalled so i'll check to see if anything is funky there.

as far as filling the tank, i filled a bit more after the first click, didn't take much to round to the next dollar which is what i usually do. I'm going to run it today and tomorrow and try to fill up again tomorrow and see if the tank holds as much as the gauge says it should. that way i'll know if its the gauge that's messed up or if i'm really losing gas some how.

[YotaFun]

the last 6 months or so ive noticed if i pull the filler nozzle out when it first clicks off, im not actually full. i let it drain into the tank and then click it again till it stops, this usually gets me to full. just an idea to throw out there.

Mine has been doing that for the past year.
Its really freakin annoying.
Stepdads 02 doesn't do it.
How I envy that runner more and more...

[corax]

get a locking gas cap . . .

[Tankota]

get a locking gas cap . . .

Haha, yea. Its probably the kid across the street steeling gas for his go-cart.

[cobradcab6]

haha........ kid must be hiding in the bed of the truck and stealing it while i'm driving then

[04 Rocko Taco]

Try running it until its about to run out of gas, fill up, should be VERY close to 18.5 gallons. If that works, reset the trip odo, and drive around till about half a tank or so (better if you could do it contiusously, but I know nobody likes to waste gas (but this was we can rule out the stolen gas route) then go back, and fill it up again, and divide the number of miles you drove by the amount of gas your truck to fill up, and see if it seems right. If so, I would just keep a close eye on that gauge, if not.... then come back.

[Good Times]

Once you sort out the fuel consumption figures look into the fuel sender unit. It might just be going bad. All you need to do is pull it off and just run an ohm meter test on it. Check your high and low settings in your FSM (Field Service Manual) to determine if the high/low numbers are hitting on the ohm meter. If it does not then you know what you need to replace. If not, I'm not sure.

My bet is that your fuel sender unit has gone bad.