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Can anyone help me out here?.....I have an 85' F-150...For some reason my fuel gage only seems to work over half a tank.....not sure that there is a half tank in it though...when you fill the truck...it reads full and will work till it reaches half,then goes down to empty....even thiugh its not...gage? sending unit? float?.....not sure what to replace...please help....fast77
Sounds like a typical fuel guage for this era of trucks. Check your wiring. You could try replacing the sending unit. The guage itself in the dash rarely goes bad though.
fast77, More than likely the sending unit is bad. I had a carbon copy problem with my 82 and it was the sending unit. I took the sending unit apart and the reostat was broken apart where it would not register after a certain point.