Fuel gauge reading - Suzuki GSXS1000 Forum
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post #1 of 10 Old 07-16-2019, 05:06 PM Thread Starter
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Fuel gauge reading

Sorry for jumping straight in on my second post with an issue but I hope you can help.
My fuel gauge is showing full, all of the time. I've refilled, I've giggled I've turned off n on, so I guess I need to get more technical.
Any clues?
Cheers.
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post #2 of 10 Old 07-16-2019, 06:07 PM
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It will show full for a good ways before the bars start disappearing. Based on my experience it will go probably 50 miles showing full. Have you rode 100 miles or more on a tank? Just like a car, the gauge (or indicator) will come down slowly for the first half, then quicker the second half of the tank.
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post #3 of 10 Old 07-16-2019, 06:36 PM
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Based on my experience the gauge says I have 127 miles range after I fill and then 106 once I pull out the station. It's got to be the sending unit if it never moves.
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post #4 of 10 Old 07-16-2019, 09:54 PM
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Found this:
Sending Unit Failure is the most-common cause of a gas gauge not working. When the vehicle is in motion, the sending unit is in constant motion, constantly rubbing the variable resistor. Over time, the contacts can wear, leading to an open circuit. The gas gauge might interpret voltage feedback from a dead sender as FULL or EMPTY, consequently pegging the gauge no matter the actual fuel level.


I have to ask - have you ever 'siphoned' gas from your tank (or into your tank)? If so, the hose might have dislodged something when it was in your tank. Your fuel pump and sending unit are in there. Gotta be cautious to not 'hit' them when sticking things in the tank. Not saying you did...just a thought.
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post #5 of 10 Old 07-17-2019, 05:54 AM Thread Starter
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Hi nope never siphoned or ran empty. I just noticed the range wasn't falling, then it hit me the guage hadn't moved, trip since last fill was 60 miles, so I refilled, still no change after another 40.
For those that asked 're movement after a while, I've had the bike for 3 years, the range gets less after a few miles and after 30 or so I start to lose bars, sorry used to. Now reads permanantly full.
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post #6 of 10 Old 07-17-2019, 02:22 PM
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Have you lifted the tank or done anything else related to that area lately? How many miles on the bike?

2016 GSXS1000F
2007 Honda VTX 1800F3
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post #7 of 10 Old 07-18-2019, 01:36 AM
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Have you had the bike apart at all? Could a wire or plug be dislodged ?
If not I would say a sticking sender is the problem


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Pull my finger
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post #8 of 10 Old 07-18-2019, 03:06 AM Thread Starter
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Nope done no work since service in December, low mileage bike, nothing but fuel been near the tank. So it sounds like sender unit fluffed? So expensive. So Ill just use the trip to fill up.
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post #9 of 10 Old 07-18-2019, 10:36 AM
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The float assembly is~100$ u.s. if you're up for doing the labor. I'm sure a shop would charge 3 hours for it.
I can post the readings later for testing but since you need to pull the pump to get to it, might as well replace it once there.
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post #10 of 10 Old 07-18-2019, 04:02 PM
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Maybe will be better to start the "debugging" with the Techron Cleaner.
It did the magic for me when I had the same issue with my old Gsx650F.

Good luck with this!

Annuit coeptis
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