fuel gauge problem
 

This season my mustangs fuel gauge always reads MAX full and bever moves past that point when the car is running. I ordered a new fuel level sending unit from ford, but just curious if anyone else has run into this problem?

Hey there what has happened is the sender unit in your gas tank has a electronic board and when you fill and when it is empty the thing moves up and down, what has happened is the connect has worn off, if you take the send unit out of the gas tank you will see what im talking about. its not your gauge.
Ernie

i jst got done spending 2 weeks messing with my fuel gauge and finnaly fixed it i would try slaving in the new fuel sender when you get it before droping the tank (pain in the ***). when you slave in the new sender remember that the gauge has an anti slosh chip that is in your instrument cluster. so if you have the sender set to read full and you have the key on and you move the sender the other way the gauge will not move! beacuse it thinks the gas sloshed over and its not getting the correct input from the sender. but if you turn the key off and back on it should read empty because it thinks it is a good reading. make sense? if the new sender doesn't fix it email me or post a message and i will tell you what and where you should have voltage readings. like i said i spent a while messing with mine. hope this helps

Concur - had the same problem in our 88GT stang. Put in a new sender and problem fixed. Very rarely is the guage the guilty party it's either a ground issue, connection issue, or bad sending unit in the tank.