Misc. Ran out of gas!

[B4tn]

Guess the old 81CJ gas gauge is not that accurate lol. It was reading about 1/4 tank. At least I was close to home. Strange though, I dumped in 2 gallons from a can, got it started after a few tries with starting fluid, and drove to the gas station. I could not for the life of me get more than 8 gallons to go in. Surely the tank is bigger than 10 gallons but gauge reads full and it fires right up again. Any thoughts?

 

[Belizean]

Your gage isn’t accurate as you can see. Mine has been inaccurate for quite a long time. I just write the mileage down on a yellow sticky pad and have it taped to the dash. One of those things I will probably get to one of these days, probably.

 

[KRUPP]

Tank should be about 14-15 gallons, at least.
I think an option was also a 20-ish gallon tank.

Gauges are no bueno for accuracy. You can probably hold a few more gallons though.

 

[KRUPP]

Unless the tank is not oem.
Can you look and take a pic from the side of the tank?

 

[Jeep Soup]

Your Pick Tube may be bent, or from corrosion, has developed a Pin Hole leak. Once the Gasoline has dropped below the Pin Hole, it will suck air and no longer "Lift" the liquid (Gasoline)

 

[B4tn]

It’s a metal tank. The evap stuff is pretty crusty. I’m leaning towards an issue with the pickup. I will have to add to the list of to do items drop the fuel tank.

 

[CJ]

That is definitely a factory steel tank. It looks to be in good condition.

 

[OldSeaDog]

I use a grease pencil and fill up every 100 miles or so. My 81 has rhe same issue. Lol

 

[TSB8C]

The stock tank was 13 gallons. Some aftermarket poly tanks are 20. So either a bent arm on the float, a float with a small pin hole that has let fuel into it, or pickup tube issue (clogged sock filter, etc). Pull the pickup tube assembly and check those three things.