Sprint 2001 Sprint St Fuel Gauge Fault

Discussion in 'Sprint & Trophy' started by Triumph Fan, Jun 14, 2019.

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  1. Triumph Fan

    Triumph Fan New Member

    Jun 13, 2019
    17
    3
    Farmington Hills, MI USA
    I put my bike away for the winter using an accurately measured and mixed amount of StaBil fuel stabilizer. I started it up this spring and the fuel light comes on and the fuel gauge indicates empty, though the tank is full. It has been 90% at fault, with occasional moments of functioning properly. Any thoughts?
     
  2. Smilinjack

    Smilinjack Crème de la Crème

    Aug 14, 2016
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    #2 Smilinjack, Jun 14, 2019
    Last edited: Jun 14, 2019
    Have you actually ridden it yet? Mine did this after a layup but a few bumpy roads put it right. Sender unit is well known for sticking and occasionally will come apart. Take it for a ride and let it shake around a bit first :)
     
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  3. Smilinjack

    Smilinjack Crème de la Crème

    Aug 14, 2016
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    Now, here's a thing. I caught a ferry today, and as the crewman directed me into my parking spot, l flicked the kill switch to cut the motor and leave it in gear. Kill switch back to on position ready for restart. When we docked the starter wouldn't spin. Flick kill switch off and on, and it fired up. However, the fuel gauge displayed no bars whatsoever! Bike was filled 25 miles previous to this, and after about 5 miles a bar appeared, and slowly the gauge got itself back up to where it should be. All of which supports my previous post, but also something odd happens when you flick the kill switch-had similar weird behaviours from my Speed Triple. Just thought it might be worth sharing :)
     
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  4. freck

    freck Senior Member
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    May 4, 2017
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    Preston, Lancs, UK
    Now I don’t know if it’s true of the newer bikes but I was told a while ago that my Daytona shouldn’t be shut off with the kill switch as it can corrupt the ECU, or at least cause some problems.
    It’s because the kill switch is for an emergency shut down only as it kills power instantly to the ECU whereas shutting off with the key doesn’t, which allows time for the ECU to write updated data to its memory.
    I’ve not looked into it to see if this is true, but it sounds plausible. I have heard reports of ECUs becoming U/S because of this.
     
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  5. Smilinjack

    Smilinjack Crème de la Crème

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    In my experience l might be tempted to go along with that @freck kind of conclusion l'd come to :)
     
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  6. joe mc donald

    Subscriber

    Dec 26, 2014
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    Triumph Fan.
    Yes I would tend to say its a sticky old float in your tank.
    Ride Safe.
    Joe.
     
  7. Triumph Fan

    Triumph Fan New Member

    Jun 13, 2019
    17
    3
    Farmington Hills, MI USA
    I've ridden it quite a bit, but can it be a sticky float, when it didn't work, then it worked for a few minutes, then quit again? To me that sounds more electrical than mechanical, although I hope you're right!
     
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  8. Smilinjack

    Smilinjack Crème de la Crème

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    I've read about the connectors fracturing too, sometimes can resolder them. That might give the kind of issues you are experiencing :)
     
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  9. Smilinjack

    Smilinjack Crème de la Crème

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  10. joe mc donald

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    Dec 26, 2014
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    I had a friend with an early trident and it was a beggar worked some times another it messed about. He had to replace the float. Couple of years later it started again. He bent the float so it showed full al the time. Problem sorted. Well it was a few months later when he wrote if off.
    Regards
    Joe.
     
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