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Petrol Gauge Fault

Discussion in 'XJ Technical Chat' started by biggo, Jan 2, 2021.

  1. biggo

    biggo Member

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    Not sure if anyone can help me with an issue I have on my fuel gauge ( 1988 XJ900F )
    The gauge was working fine and then the bike would run out and onto reserve but the gauge was still reading 1/4 full . Luckily I have a spares bike so I tried the tank sender unit no joy still the same. Next was to dismantle gauges and fit second hand Gauge unit I had . All worked fine so happy days !
    I have gone through about four tanks of fuel and now the gauge has today not going lower than 1/4 .
    It goes down to empty if I disconnect tank sender but I seem to be at the start again.
    Any Ideas ? Thanks Phil :)
     
    biggo, Jan 2, 2021
    #1
  2. Jetfixer

    Jetfixer Well-Known Member

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    Carefully check the sending unit their are windings inside and an arm on the float the windings may have burnt out on the low setting . Remove sending unit plug into plug , move float arm full up , see if it shows full on gauge , now drop till it shows half, and drop down to empty , it may show 1/4 . This may be the best way to see what it is doing . Do this test quick you don't want it overheating , you may spray some WD40 into the wiper arm , fuel keeps this cool . Cheers
     
    Jetfixer, Jan 2, 2021
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    Franz likes this.

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