Gas gauge problem
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Freshman User
Joined: Aug 2004
Posts: 47
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From: Illinois
Gas gauge problem
I just bought a '99 F-350 diesel and was told the gas gauge is off and runs out at 1/4 tank. The gauge does move to full but only goes down to 1/4. Has anyone ran across this before. How do you fix it. Also has door lock problems. Where do you get the actuators? Ford or aftermarket? price? Thanks
Moderator
Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
You need to do the old "ground the sending wire" test to see if the problem is the wiring or the gauge, or the sending unit in the tank. I will have to wait till I get home to see what the wire colors are that you need to look for at the tank.
Senior User
Joined: May 2004
Posts: 207
Likes: 0
From: Wisconsin
i am having this same exact problem with my 77 f250. when i fill it up the guage pegs out way past full and it runs out of gas at 1/4+ tank still showing on the guage. would the same test still apply?
Moderator
Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
Yes. Go back to the tank and take the sending unit wire off. Turn the keyswitch to run, but don't start the truck. With the sending unit wire hanging in the air touching nothing, the fuel guage in the dash should swing full scale in one direction. Then take the sending unit wire and ground it on a good clean place on the frame. The guage should swing full scale the opposite direction. If this works, then the wire and the gauge are good, and there is something wrong with the sending unit, or the ground to the sending unit.
