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Thread: Malfunctioning gas gauge

  1. #1

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    04-10-2011
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    WA
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    1990 Mitsubishi Mighty Max
    Engine

    6G72

    Malfunctioning gas gauge

    When the gas gauge on my '90 gets to about a quarter tank left, it slowly starts to creep up to over a half. Since my trip meter has never worked since I got the truck, I have to keep an eye on the odometer and refill after 225 miles, which is fine when I remember my previous mileage. Any advice on how the gas gauge works and what could be the issue?
    1990 MM 4x4 3.0
    1991 MM 4x4 3.0 Diamonte
    1994 MM 2wd (work in progress)

  2. #2



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    1979 Dodge D-50
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    Inside the tank is a float that connects to a wiper arm that runs up and down a resistance wire. The wire is worn through and broken. You need a new sending unit.
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  3. #3

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    04-10-2011
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    Location

    WA
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    1990 Mitsubishi Mighty Max
    Engine

    6G72
    Thanks, Camoit. So I take it the tank needs to be dropped or can the sending unit be accessed with the tank in place?
    1990 MM 4x4 3.0
    1991 MM 4x4 3.0 Diamonte
    1994 MM 2wd (work in progress)

  4. #4


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    Columbus, OH
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    1992 Mitsubishi Mighty Max
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    Other
    Tank has to be dropped, not that bad of a chore. Drain it first! (there is a drain Plug)

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