90 wrangler...fuel gauge has started moving on it's on while driving, it may have a half tank....look at it a minute later and it will be on full or empty...ran out of gas reading a half, where should i look first....sending unit ir maybe the gauge...i have looked at all the grouds, seem to be intact.no bad wires,,,started keeping up with the gas ont the trip miles,,hate walking....

That's all I ever did with the CJ! Keep it full rather than near empty, fill 'er up every 200 miles, no worries! When in doubt, fill 'er up again! I would think it more likely the sender than the gauge. A little trouble shooting should narrow it down. <img src="/forums/images/graemlins/cheers.gif" alt="" />

Yep! If all the plugs and wires are Ok put a new sender..I never saw a gauge go bad..others have but not me.
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />

thanks will get one and try that,,,,that will be the hardest task anyway,,,dash work is not to bad

coach

yea, i agree... it sounds like the sending unit.

sometimes the needle on the gauge gets twitchy but you know how full your tank is regardless

Could be a bad ground back at the tank? Unhook it reclean it up and hook it back up. Start cheap

On our '91 Wrangler with plastic tank it was this: inside the gas tank(once you remove the sending unit) you will see a white plastic trough. This was originally heat welded to the bottom of the tank and the sending unit float rests inside it. Its purpose appears to be negating wave action when the tank is low and which would make the float bounce up and down. Problem is the tank flexed with age and the heat welds gave out. The white plastic trough had become a battering ram and was consistently interferring with and destroying the sending unit. I never found a glue that would hold it in place. Best solution is to know your max. milage on a tank, set the trip odometer at fill up, and that is your new guage.