I have two ford Rangers,Fuel gages on both lie to me! On the 94 works ok when I fuel up then starts to go by fuel. The 92 only works once in a blue moon. Any answers?

yeah......replace them

Do you mean the gauge goes up and down? Like it goes down a little bit...then up...then back down...

Mine does it too, I think all Rangers and Explorers do it, my brother owns an exploder and it does the same thing.