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Discussion Starter #1
My appologies if this has been covered before, but a search of prior threads didn't seem to cover this issue I am having. My fuel gauge on my '07 shows the tank to be on the last half gallon all the time. I removed the sending unit this morning for an inspection and a test with my ohm meter. All was clean and my ohm meter showed varying resistence when I moved the float up and down. My next test is to put a resistor into the sending unit plug to see if I can get the gauge to indicate any change. Can anyone share a similar experience and the fix before I start tearing body work off and checking connections?
 

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resistance

in case you need it, from the service manual

Full=4 ohms approx
empty = 182 ohms approx

when testing the on-board fuel gage, with a test resistor, turn ignition on then wait 40 seconds (for the gage reading) is what is says
 

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Discussion Starter #3
in case you need it, from the service manual

Full=4 ohms approx
empty = 182 ohms approx
I am currently waiting for my service manual to arrive, so your info is appreciated. Those are the same values I achieved with my test. I am going to get a 20 ohm resistor at Radio Shack later this evening and try to get my gauge to show a different reading. I believe you bridge the resistor between the Y/B and B/W, correct?
 

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Discussion Starter #4
Okay, here's the deal. EVERYTHING checked out just fine. :headbang: So I filled her up with gas and was going to check the sending unit periodically to compare ohm readings to the guesstimated fuel level. 183 ohms with a full tank, half tank, etc. So the guage works outside of the tank, but nil inside. Do any of you electronics gurus have any ideas before I drop a C note towards a new sending unit. Convince this old tightass there is nothing I can do to repair this unit.
 

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What ohm reading do you get with the tank full? High, as in 180/160? If so possibly a fuel logged and as such a sunkin' float?
Keep us posted.
Tom Hart
 

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I do like the idea of having a float that doesn't "float." I had some carb issues back in the day that were frustratingly hard to diagnose and found that the floats sank.
 

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Mine is the top bar missing.......... Am waiting to see your results... stupid sender, my 2nd one...............
 

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Discussion Starter #8
What ohm reading do you get with the tank full? High, as in 180/160? If so possibly a fuel logged and as such a sunkin' float?
Keep us posted.
Tom Hart
Yep, it does sound like a sunken float. It has been over 100 degrees here in north Texas for way too long, and since my shop doesn't have a/c I haven't taken time to pull things again to check the float. I think I might go for a midnight ride and pull the level down a couple of gallons then use a small mirror and look into the tank and see if the float is a floating. Will keep ya posted.
 
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