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| Fuel Gauge/Sender issues (Page 1/2) |
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Bluegrass Fiero
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JUN 24, 04:27 PM
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Hey all, so my fuel gauge is currently very screwed up, it sits here: 
And I measured the resistance between the pink/purple wire and the black on and got 1.365k Ohms (yes I read it correctly, and will happily remeasure and take a picture this time if anyone would like). So then I tried jumpering a couple wires (can't remember the post ATM, if I find it again I'll link it below) that is supposed to make the gauge fall to empty and instead it jumped to here: 
So now I'm really stumped, should I just bite the bullet and order a new sender and replace it or is there anything I can test/try first?
P.S. the fuel gauge was working fine till the last time I filled up the tank and that's when it decided to read way over and get stuck, maybe the issue is with the fuel gauge itself and not in the tank?
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cartercarbaficionado
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JUN 24, 05:31 PM
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| quote | Originally posted by Bluegrass Fiero:
Hey all, so my fuel gauge is currently very screwed up, it sits here:
And I measured the resistance between the pink/purple wire and the black on and got 1.365k Ohms (yes I read it correctly, and will happily remeasure and take a picture this time if anyone would like). So then I tried jumpering a couple wires (can't remember the post ATM, if I find it again I'll link it below) that is supposed to make the gauge fall to empty and instead it jumped to here:
So now I'm really stumped, should I just bite the bullet and order a new sender and replace it or is there anything I can test/try first?
P.S. the fuel gauge was working fine till the last time I filled up the tank and that's when it decided to read way over and get stuck, maybe the issue is with the fuel gauge itself and not in the tank? |
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try using resistors directly on the gauge wires to simulate a empty tank and if that doesnt work then the gauge might be bad
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Bluegrass Fiero
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JUN 24, 06:54 PM
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| quote | Originally posted by cartercarbaficionado:
try using resistors directly on the gauge wires to simulate a empty tank and if that doesnt work then the gauge might be bad |
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What size resistor would you recommend 100/200/1k something else, or does it matter?------------------
1987 Iron Duke SE
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cartercarbaficionado
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JUN 24, 07:20 PM
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| quote | Originally posted by Bluegrass Fiero:
What size resistor would you recommend 100/200/1k something else, or does it matter?
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what ohm is the stock sender putting out?
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Bluegrass Fiero
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JUN 24, 07:21 PM
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cartercarbaficionado
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JUN 24, 07:26 PM
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then it looks like a 90 ohm resistor +/-10 percent should be perfect for seeing if the gauge is correct. if it isnt theres ways to correct it
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Bluegrass Fiero
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JUN 25, 07:24 AM
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| quote | Originally posted by cartercarbaficionado:
what ohm is the stock sender putting out? |
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I'll double check this afternoon, but the other day it was 1.365k ohms. Which I know is WAY the heck off.
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cartercarbaficionado
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JUN 25, 03:14 PM
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| quote | Originally posted by Bluegrass Fiero:
I'll double check this afternoon, but the other day it was 1.365k ohms. Which I know is WAY the heck off. |
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that would mean its completely empty plus some. so yeah its probably broken which on a gm product isnt unusual
edit:brain dumb. thats hilariously out of spec. you sure you haven't hooked the fuel sending wires to a cup of salt water? joking[This message has been edited by cartercarbaficionado (edited 06-25-2025).]
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cliffw
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JUN 25, 04:49 PM
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Sorry, I am no help. My fuel guage is the trip odometer. 
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Bluegrass Fiero
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JUN 25, 07:03 PM
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| quote | Originally posted by cartercarbaficionado:
you sure you haven't hooked the fuel sending wires to a cup of salt water? joking
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Not that I am aware of lol, do you know where the best place to get one is? and if I'm dropping the tank for that anyway, what else should I do while I am in there? easy way to test if my fuel pump is good?
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