strange fuel gauge


Information and questions on GL1100 Goldwings (1980-1983)
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squirrel
Posts: 346
Joined: Thu Jan 31, 2013 10:19 am
Location: portsmouth uk
Motorcycle: 1982 gl1100c (interstate)

strange fuel gauge

Postby squirrel » Sun Feb 07, 2016 2:16 pm



I've now filled up twice but the fuel gauge only shows a little over half full .The temp gauge works fine .any ideas welcome .thanks



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RBGERSON
Posts: 2612
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: strange fuel gauge

Postby RBGERSON » Sun Feb 07, 2016 2:53 pm

Open the tank pull the gas sending unit out bend the arm down a bit..put it back in and check the gauge..bend until it reads full..do this on level ground, bike on center stand. Then ride it around or drain the tank and see if it reads empty when it's empty..if yes go to go if not issues with the circuit too much resistance someplace.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

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squirrel
Posts: 346
Joined: Thu Jan 31, 2013 10:19 am
Location: portsmouth uk
Motorcycle: 1982 gl1100c (interstate)

Re: strange fuel gauge

Postby squirrel » Sun Feb 07, 2016 3:02 pm

Apologies for being thick but what would the gas sender unit look like

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Oldbear
Posts: 289
Joined: Fri Jun 24, 2011 7:02 pm
Location: Linden, Alberta, Canada
Motorcycle: 1983 GL1100A Aspencade

Re: strange fuel gauge

Postby Oldbear » Sun Feb 07, 2016 6:04 pm

squirrel wrote:Apologies for being thick but what would the gas sender unit look like


I would try some Seafoam or similar in the tank or pull the sender out and clean the sender with some contact cleaner and a soft brush/cloth. It could be the electronic part where the fuel level/float arm attaches to the sender; if it gets gummed up, you can get the wrong resistance reading and therefore the wrong fuel level reading.

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User avatar
RBGERSON
Posts: 2612
Joined: Tue Mar 09, 2010 7:57 am
Location: SCOTTSDALE, AZ
Motorcycle: 98 SE GL 1500
had every year from 75 to 83

Re: strange fuel gauge

Postby RBGERSON » Sun Feb 07, 2016 7:55 pm

Take the seat off. Disconnect the wires. Then tap the locking ring loose, spin it off and pull the hold thing up and out. To clean the coils that send the omhs reading you have to remove the small box that covers everything on the unit..it can be pried off..but be careful if you break the little copper wire that is solder tot eh under side of the unit..it's toast. I dip mine fuel sender units in a muractic acid bath 50/50 acid and water for a few minutes cleans them right up.

You can test the unit with a meter before you do anything..to see if you get a change in the ohms as you move the arm. It should change as you move the arm up and down.

PS if you do the acid wash be sure to rinse the unit with water or gas after the dip or the acid will keep eating.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

FAIR WINDS,
RB

User avatar
squirrel
Posts: 346
Joined: Thu Jan 31, 2013 10:19 am
Location: portsmouth uk
Motorcycle: 1982 gl1100c (interstate)

Re: strange fuel gauge

Postby squirrel » Mon Feb 08, 2016 2:25 pm

Thank you for your replys .I will only be able to check it on Saturday but will let you know what happens

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squirrel
Posts: 346
Joined: Thu Jan 31, 2013 10:19 am
Location: portsmouth uk
Motorcycle: 1982 gl1100c (interstate)

Re: strange fuel gauge

Postby squirrel » Sun Feb 14, 2016 10:12 am

Update, cleaned contacts first because you never know and lo and behold the fuel gauge now works perfectly . Thank you all for your advice .

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Oldbear
Posts: 289
Joined: Fri Jun 24, 2011 7:02 pm
Location: Linden, Alberta, Canada
Motorcycle: 1983 GL1100A Aspencade

Re: strange fuel gauge

Postby Oldbear » Sun Feb 14, 2016 2:51 pm

One of those connections doesn't look stock. I wonder if the previous owner had issues too.
My wife is the greatest - she won't let me sell my bike - I'm less grumpy when I ride...

User avatar
squirrel
Posts: 346
Joined: Thu Jan 31, 2013 10:19 am
Location: portsmouth uk
Motorcycle: 1982 gl1100c (interstate)

Re: strange fuel gauge

Postby squirrel » Sun Feb 14, 2016 3:51 pm

I never considered that , l may have a closer look at the wiring .thanks

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Oldbear
Posts: 289
Joined: Fri Jun 24, 2011 7:02 pm
Location: Linden, Alberta, Canada
Motorcycle: 1983 GL1100A Aspencade

Re: strange fuel gauge

Postby Oldbear » Sat Feb 20, 2016 12:22 pm

I was just flipping through the shop manual and found the fuel gauge sensor resistance:

Resistance should be:
75-80 Ohms @ empty
6-10 Ohms @ full

Just so the next person doesn't have to dig to find it. It's on 18-25 of the manual. ;)


My wife is the greatest - she won't let me sell my bike - I'm less grumpy when I ride...


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