Fuel gauge reading tank as full.
#1
Fuel gauge reading tank as full.
Hey guys. Filled up my truck before a fairly long drive back home after visiting family. On the trip down, the fuel gauge worked as it should and used a little over a 1/4 tank. For the trip home, I filled it again, but the fuel level did not drop on the drive home. It's still reading full, but I know that's impossible. I haven't checked the ground or anything yet, just thought maybe one of you would have an idea why it's still reading full . I'm wondering if maybe the sending unit is fried. Thanks guys!
#2
#3
You'll have to troubleshoot it to find out why.
Unplug the sending unit and turn the ignition to "on". Does the gauge stay on "E" or does it still swing over to full? If it goes to full then either there's a problem in the wiring or the gauge is bad. If it now stays on "E" then probably a bad sending unit.
Unplug the sending unit and turn the ignition to "on". Does the gauge stay on "E" or does it still swing over to full? If it goes to full then either there's a problem in the wiring or the gauge is bad. If it now stays on "E" then probably a bad sending unit.
#4
The temp. gauge seems to be working fine. I'll do some messing around with it tomorrow and see what happens. Just odd that it happened so suddenly. Thanks for the reply.
#5
You'll have to troubleshoot it to find out why.
Unplug the sending unit and turn the ignition to "on". Does the gauge stay on "E" or does it still swing over to full? If it goes to full then either there's a problem in the wiring or the gauge is bad. If it now stays on "E" then probably a bad sending unit.
Unplug the sending unit and turn the ignition to "on". Does the gauge stay on "E" or does it still swing over to full? If it goes to full then either there's a problem in the wiring or the gauge is bad. If it now stays on "E" then probably a bad sending unit.
What's the best way to test the sending unit I picked up, and also to test the one that's already in there to see if it is indeed bad?
#6
Use an ohm meter to check the resistance. I can't remember the value off the top of my head, I'll have to look them up.
Hook the meter's leads to the terminals of the sending unit. Move the float arm, the needle should move with the arm.
Do the same to the bad unit, chances are, the needle won't move when you move the float arm.
EDIT: 8-12 ohms full and 70-73 ohms empty.
Hook the meter's leads to the terminals of the sending unit. Move the float arm, the needle should move with the arm.
Do the same to the bad unit, chances are, the needle won't move when you move the float arm.
EDIT: 8-12 ohms full and 70-73 ohms empty.
#7
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#8
Use an ohm meter to check the resistance. I can't remember the value off the top of my head, I'll have to look them up.
Hook the meter's leads to the terminals of the sending unit. Move the float arm, the needle should move with the arm.
Do the same to the bad unit, chances are, the needle won't move when you move the float arm.
EDIT: 8-12 ohms full and 70-73 ohms empty.
Hook the meter's leads to the terminals of the sending unit. Move the float arm, the needle should move with the arm.
Do the same to the bad unit, chances are, the needle won't move when you move the float arm.
EDIT: 8-12 ohms full and 70-73 ohms empty.
#9
Drop the tank or lift the bed, dropping the tank is easier IMO. Bed bolts are usually really rusty and during the removal process the you will mess up the square lock flange in the bed.
The rheostat, arm float and pick up tube are all one.
The filter sock is bonded to the end of the pick up tube with some kind of material that is fuel resistant.
The rheostat, arm float and pick up tube are all one.
The filter sock is bonded to the end of the pick up tube with some kind of material that is fuel resistant.
#10
Drop the tank or lift the bed, dropping the tank is easier IMO. Bed bolts are usually really rusty and during the removal process the you will mess up the square lock flange in the bed.
The rheostat, arm float and pick up tube are all one.
The filter sock is bonded to the end of the pick up tube with some kind of material that is fuel resistant.
The rheostat, arm float and pick up tube are all one.
The filter sock is bonded to the end of the pick up tube with some kind of material that is fuel resistant.
#11
Getting the old filter off is not the problem, finding what ever Ford used to bond it to the pick up tube is the hard part. Maybe mikeo0o0o0 knows?
Was a used one the much cheaper than a new one?
Since your bed has been off before that's the easier route to go.
What "Ford field of dreams" are you talking about?
Was a used one the much cheaper than a new one?
Since your bed has been off before that's the easier route to go.
What "Ford field of dreams" are you talking about?
#12
[quote=77&79F250;14589410]Getting the old filter off is not the problem, finding what ever Ford used to bond it to the pick up tube is the hard part. Maybe mikeo0o0o0 knows?
Was a used one the much cheaper than a new one?
Since your bed has been off before that's the easier route to go.
What "Ford field of dreams" are you talking about? [/quote
It would be good to know what they used for an adhesive. The filters are available, so there must be something they suggest to use to adhere them.
Yeah, a used sending unit was 6 dollars at the pull and pay.
The one you photographed 50 or 60 trucks at.
Was a used one the much cheaper than a new one?
Since your bed has been off before that's the easier route to go.
What "Ford field of dreams" are you talking about? [/quote
It would be good to know what they used for an adhesive. The filters are available, so there must be something they suggest to use to adhere them.
Yeah, a used sending unit was 6 dollars at the pull and pay.
The one you photographed 50 or 60 trucks at.
#13
There's no mention of the pickup mounted filter sock in either of them, let alone how to change it.
I also went through Ford's list of chemicals and again, nothing.
This is one of those items that Ford fails on when you're looking for info.
I did a search online and you might try something like this:
#14
I do believe you were correct about the float arm being stuck. I went for a drive yesterday hit a couple of bumps and all of a sudden the gauge went down to the half mark, which is about right. I think I'll still take the bed off at some point and look at the sending unit and see if I can clean it up a little bit, and look to see if there's a bunch of junk in the tank too. So for now, problem seems to be solved. Thanks for everyone's help!
#15
Tie a small piece on rope on one end of a piece new or rust free 2 or 3 ft HD log chain and roll and shake the tank around, the chain will loosen the scale and rust.
Inside tank treatment kits available. New metal tank all as much, get plastic no rust ever again. MTS COMPANY, L.C. - Ford Pickup fuel tanks
I am sure pulling and cleaning the sending unit and giving it the once over will help.
Inside tank treatment kits available. New metal tank all as much, get plastic no rust ever again. MTS COMPANY, L.C. - Ford Pickup fuel tanks
I am sure pulling and cleaning the sending unit and giving it the once over will help.
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