gas guage question

[tjdeerslayer37]

my 91 ranger gas guage doesnt work, it constantly reads just less than half a tank and i know that it has a full tank. is there a fuse for the guage?

if theres no fuse what are the odds that it is just the guage that is broke? and how do i know?

if not the guage then is there a sensor in the gas tank that can be replaced and what is it called? fuel level sensor or something?

thanks

 

[graff104]

most likely the float in the tank. Im pretty certain there is a fuse in the fuse panel check that first though.

 

[Sasquatch_Ryda]

Its called a sending unit.

 

[dogboy]

I don't have numbers, but I'm sure you can find the voltage/ resistance values that you need to TEST the gauge, and/ or sending unit.

The diagnosis is not replacing things, it is testing them.

 

[Coleosis]

My 95 4.0 had the gas guage stuck on full for a while...my buddy took out the float and greased it...I wish I had been around to see how he did it exactly, but it works fine now.

 

[RustedRanger]

If you take the sending unit out be careful not to bend the wire the float goes on. I had to get a tank from the junk yard because mine was rusted out,the sending unit and fuel pump looked new so I got it too,the tank had a dent on the bottom so I bent the line holding the fuel pump a little bit to get it off the very bottom of the tank...big mistake! It threw the gas gauge was off,it showed the level dropping by a quarter tank in 30 miles. It also leaked badly around the sending unit O-ring because I used the old one,even though I was careful putting it in. If you need to take it out be sure to get a new O-ring,the parts stores dont have them but Ford does and it was under $2. If you need to get a new sending unit it comes with the O-ring.