Fuel Gauge Issues

By Mark DiPietro & filed under Harley Tips.

Question for Fix My HogI have been having fuel gauge issues for the past couple of years, and it’s time to tackle them! When my fuel gets to about 3/4 tank, my fuel gauge begins to bobble from full to 1/4 tank (moving back and forth without reason). Once my fuel level gets down to about 1/4 tank, the gauge settles down again. I am guessing that it has to do with a faulty fuel float? I haven’t seen any related videos, but I may be looking in the wrong area. I’d like to properly diagnose and then replace/repair the effected part.

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Discussion
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21 Responses to “Fuel Gauge Issues”
  2. Richard Williams
    Richard Williams

    I have a 2010 Ultra trike,my fuel gage stopped work while having voltage regulator issue !!! Any help would be great .

    Reply
  4. Alan Glad
    Alan Glad

    Try some Chevron Techron Concentrate (Black Bottle) available at auto parts stores and Wal-Mart. BMW riders with float type senders having been using for years. Mix about double the ratio whenever you can leave in the tank for a while. It removes the contamination on the windings of the float switch that the wiper contacts. Also works great on car float senders. Just used on my 2010 Scion with 120,000 miles where sender went intermittent. Took about 5 tanks to clear up the problem. Cheap fix and works great.

    Reply
  5. Bob Coy
    Bob Coy

    I’ve a 2004 FXSTI standard softail I put a new speed sensor. My speedometer is still pegging out weather I sit there and idel or ride what causes this?

    Reply
  7. Don
    Don

    I have a 2005 Deluxe and the fuel gauge is always pinned at full. Plug is good wires all good. Little help would be great. Thanks.

    Reply
  8. William
    William

    I have an 05 Softail Fatboy. My fuel gauge is stuck on “full” all the time. I watched a video on replacing the fuel gauge and I did the swap but my fuel gauge is still stuck on “full” even though I have half a tank? What’s next please?

    Reply
  9. Frederick McLeish
    Frederick McLeish

    A recent problem has begun with the LED Fuel Remaining readout on my 2014 Heritage Softail. It always read 180 after a fillup and had a predictable drop as miles were logged, but now the readout shows a much greater value after a fillup. It has shown 220, and at one time showed 325. It sometimes corrects itself after a couple startups, sometimes not.

    Reply
  10. Dennis Gracy
    Dennis Gracy

    I have a 1997 Road King with fuel gauge issues. It never reads full. All of the videos I’ve looked at involve removing the fuel pump but none I’ve found discuss removing the float style sending unit suspended under the fuel gauge. There is a plate under the gauge with 5 screws attaching it to the tank. When the screws are removed, the plate comes loose from the tank with the float still attached below. Because the plate is still recessed in the well that holds the gauge, I can not snake out the plate and float. Is there a trick?

    Reply
    • Customer Service
      Customer Service

      Hey Alan!

      What’s the year and model of your Harley?

      Thank you!

      Jessica
      Fix My Hog Video Membership

      Reply