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Gas gauge?

Discussion in 'XJ Technical Chat' started by Lanny, May 16, 2019.

  1. Lanny

    Lanny New Member

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    Hey, just a quick question. On my control panel, my gas gauge has suddenly stopped giving a reading. Everything else seems to be working correctly. Any ideas? Thanks in advance!
     
    Lanny, May 16, 2019
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  2. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Double check that the sending unit hasn’t come unplugged. Flat,white,two-wore connected under the tank just above the air box.
     
    k-moe, May 16, 2019
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  3. Lanny

    Lanny New Member

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    First thing I checked . It is plugged in.
     
    Lanny, May 16, 2019
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  4. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    When you first turn the ignition on do you see the systems monitor light up all of the system displays during the self-check?

    I’m trying to avoid you needing to pull the sending unit, so checking everything else first.
     
    k-moe, May 16, 2019
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  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    you could measure the ohms from the connector with different levels of fuel in the tank
     
    XJ550H, May 16, 2019
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  6. Rooster53

    Rooster53 Well-Known Member Premium Member

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    I would guess it is similar to the Seca with a CMS - approximately 25 ohms full, 325 ohms empty. If the sender opens the gauge will read empty all the time.
     
    Last edited: May 16, 2019
    Rooster53, May 16, 2019
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  7. Crankwalk

    Crankwalk Member

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    Is the Maxim sending unit way harder to get to than say a Seca Turbo? 4 bolts and 5 minutes and mine is out. Easy enough to move it up and down and see if it's reading correctly.

    Also, Pie. Bacon. Burbon. Is that like bourbon? That's been driving me nuts for a few months. ;)
     
    Crankwalk, May 21, 2019
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  8. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Getting it out isn't the issue. It's getting it out nd having a new gasket on hand.
    Extra work is extra work, and best avoided if possible.
    The only reason to remove the sending unit is if the resitance check shows a need for cleaning or replacement.

    You are the first person to notice my intentional typo. I've been waiting for years.
     
    k-moe, May 21, 2019
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  9. XJ550H

    XJ550H Well-Known Member Premium Member

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    XJ550H, May 21, 2019
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  10. Crankwalk

    Crankwalk Member

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    How would you test the resistance without removing it? Wouldn't it be easiest to test resistance with the full sweep with the float? I don't know how you would do that without just pulling it out.
     
    Crankwalk, May 22, 2019
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  11. XJ550H

    XJ550H Well-Known Member Premium Member

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    at the connector. drain or fill tank with meter attached
     
    XJ550H, May 22, 2019
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  12. Crankwalk

    Crankwalk Member

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    Yeah I guess I should have clarified that I didn't see a way without an empty tank and then a full tank to get the full sweep. That seems like it would take longer that just pulling it and moving it by hand.
     
    Crankwalk, May 22, 2019
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  13. XJ550H

    XJ550H Well-Known Member Premium Member

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    siphone hose works wonders then refill
     
    XJ550H, May 22, 2019
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  14. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    And gaskets aren’t free.
     
    k-moe, May 23, 2019
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  15. Polock

    Polock Well-Known Member

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    turn it upside down to read full
     
    Polock, May 23, 2019
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