Fuel gauge problem
Senior User
Joined: Nov 2010
Posts: 133
Likes: 0
From: Arkansas
I've done some searching and havent ran across this same problem. My fuel gauge works but only half way. If I fill up the tank it will show a little above half a tank. When it's empty (or as close to it as I'm brave enough to run it) it's below the "E". So the gauge works... just not quite like it should. The fact that it doesnt work right drives me nuts. Any ideas from the pros?
Junior User
Joined: Apr 2010
Posts: 71
Likes: 0
From: North east IN.
It could be that the brass float has a small leak and fuel has got inside of it. Or maybe the sending unit came loose inside the tank. Either way you have to drop the tank and take a look inside and that would be a good time to see if the tanks rusting where the straps hold it in place.
Senior User
Joined: Sep 2010
Posts: 258
Likes: 0
From: nicholasville, ky
similar question, my gauge worked fine till about a week ago. now when i first start the truck it pegs wayyyy below e, then it will go up to the correct amount in the tank at the time, then back to below e. im lost. i did notice i have a small leak but idk if that would have anyting to do with the gauge
Junior User
Joined: Apr 2010
Posts: 71
Likes: 0
From: North east IN.
similar question, my gauge worked fine till about a week ago. now when i first start the truck it pegs wayyyy below e, then it will go up to the correct amount in the tank at the time, then back to below e. im lost. i did notice i have a small leak but idk if that would have anyting to do with the gauge
Senior User
Joined: Sep 2010
Posts: 258
Likes: 0
From: nicholasville, ky
didnt think it was. gonna take it to the radiator shop and have them clean it and seal everything. and was gonna put a new sending unit in the tank just cause it was out. but it gonna have to wait till it warms up some lol
Junior User
Joined: Apr 2013
Posts: 59
Likes: 0
fuel guage
im having same prob.fuel guage and dash lights dont work.took off the dash but there are no wires to the gas guage all the wire go to a harnes that goes into the dash cluster.what wire controls fuel guage?77 ford f100
New User
Joined: Aug 2014
Posts: 4
Likes: 0
I need help with my gas gauge , it just sits below E never moves . Is it a bad ground ? A bad gauge ? or something in my tank ?
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Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Does your temp gauge work okay? Temp and Fuel both use the same regulated power source (5.5 V).
If the temp is okay, crawl under your truck and unplug the sending unit. The plug has two wires going to it. One goes to the gauge, the other goes to a ground. Turn your ignition to the "on" position. Ground the wire that goes to the gauge and see what the gauge does. If the gauge and wiring are good, the gauge should swing over to Full.
If it swings to Full, then either the sending unit is bad or there is a bad ground point after the sender, check the wire and ground point, it's directly in front of the sender, on the crossmember.
If when you ground the wire, the gauge still doesn't move, you'll need to get a multimeter and start checking for power and continuity in the gauge and circuit.
Hotshot
Joined: Apr 2009
Posts: 14,333
Likes: 247
From: Stanley, VA
Other than that, do the troubleshooting that I posted above. You should be able to diagnose it.
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