Fuel gauge question - BMW Luxury Touring Community
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post #1 of 16 Old May 28th, 2015, 11:10 pm Thread Starter
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Fuel gauge question

I have a new to me 2005 LT.
PO said that the fuel computer does not work right.

When I fill up, gauge shows about 3/4 full, fuel light comes on at a little less than 1/4.

I was afraid to really fill up until I did the canisterectamy.

Even then when I really fill up, still shows about 3/4 full.

Do you think that full only shows 3/4 and empty is really 1 gallan left?

Thoughts? ideas to check?

thanks

Steve
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post #2 of 16 Old May 28th, 2015, 11:34 pm
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Re: Fuel gauge question

I did a quick search using 'fuel gauge calibration' This is what I found.
http://www.bmwlt.com/forums/k1200lt/...djustment.html

Scott and Theresa
Munising, MI
2004 K1200LT Black
2014 Kawasaki KLR650

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post #3 of 16 Old May 29th, 2015, 12:17 am
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Re: Fuel gauge question

possibly also the fuel filler tube is bent from leaving the nozzle dangling in the tank while filling, the float gets stuck on the tube, you can take out the filter assembly and check it, I read somewhere a broom handle is correct size to straighten it, if that's the problem.

Regards Linton
From the land of Kangaroo's and Koalas
and no koalas are not Bears



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post #4 of 16 Old May 29th, 2015, 12:57 am
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Re: Fuel gauge question

Like Axle said, the float level tube in the tank may have been bent somehow, preventing the float from rising to the top when you fill it. I had a problem with mine after I had a fuel tank venting problem and the tank collapsed against the float tube. I was only able to fix it after taking the tube apart and "rolling" the bend out of the tube. In my case, the fuel vent tube had been pinched closed between the tupperware and the tank (my fault for being to hasty in putting it back together).

Dave Beck
'16 K1600GTLE
'07 K1200LT (sold 9/24/16)
'74 Suzuki GT750L (long, long gone)


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post #5 of 16 Old May 31st, 2015, 10:56 am
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Re: Fuel gauge question

Ok I did not see this asked so I will. Are you filling the bike on the side stand or the center stand. It makes a 1/4 tank difference. Always fill on side stand and don't worry about over filling, you really have to work at it to do that. It should read full (for a few miles) if you fill it to the the ring in the bottom of the filler neck.
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John
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2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
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But lack DE, MA, RI and CT with the 2005 LT

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post #6 of 16 Old May 31st, 2015, 4:32 pm Thread Starter
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Re: Fuel gauge question

Yes,

I am filling up on the side stand
I believe the calibration is to set when the fuel light comes on.
The light comes on at about 1/4 full.

Makes sense that it might be bent stopping the float from rising.

Thanks

Steve
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post #7 of 16 Old Jun 1st, 2015, 1:02 pm
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Re: Fuel gauge question

Sounds like the tube has a ding in it from a filler tube impact. Easy to fix but you have to remove both sides of Tupperware and the stingray to get it out. Best to wait for the next 12K service. The low fuel light can be set at home without special tools. Just drain the tank and pour in 1 gallon of gas and follow the procedures. (which I will post tonite as I don't have them here at work.)

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #8 of 16 Old Jun 1st, 2015, 7:15 pm Thread Starter
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Re: Fuel gauge question

A dent in the filler tube? Is this the sending unit? Or the area you put the gas nozzle in?

Thanks

Steve
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post #9 of 16 Old Jun 1st, 2015, 7:43 pm
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Re: Fuel gauge question

yes, afaik same thing

Regards Linton
From the land of Kangaroo's and Koalas
and no koalas are not Bears



2002 K1200LT
2010 Suzuki GSX 1250FA (the Wifes)
2004 Cub Kamparoo Sprint
My Toys
1976 Datsun 260Z
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post #10 of 16 Old Jun 1st, 2015, 9:01 pm
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Re: Fuel gauge question

Filler tube on the gas station pump. You are an inch away from the sending unit tube if you angle the nozzle wrong.

Here is the low fuel set procedure:
1. Empty the tank and fill it with 1 gallon (or your desired quantity).
2. Make sure you have access to the diagnostic port of the Motorcycle and identify pin 3 and pin 4.
3. Turn the ignition on.
4. On the diagnostic port, short pin 3 (brown/black) and pin 4 (brown) for two seconds. (Make sure you have the CORRECT pins - you don't want to short Battery voltage to GROUND by mistake).

5. The tank reserve light should flash quickly. When the flashing ends, the calibration is complete.

This is what the sender looks like. The float slides inside the tube and even a small dent can hang it up.
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John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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Last edited by jzeiler; Jun 1st, 2015 at 9:07 pm.
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post #11 of 16 Old Jun 1st, 2015, 9:23 pm
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Re: Fuel gauge question

Good to know. Is shorting the pins the only or preferred way? Is this function in the GS911?
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post #12 of 16 Old Jun 1st, 2015, 9:27 pm Thread Starter
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Re: Fuel gauge question

Thanks John
I will wait till after riding season to look at this

Steve
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post #13 of 16 Old Jun 1st, 2015, 9:45 pm
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Re: Fuel gauge question

Quote:
Originally Posted by Buff8stuff View Post
Good to know. Is shorting the pins the only or preferred way? Is this function in the GS911?
The 911 will not do this. The one pin (3) goes direct to the warning module (and no where else) and that pin is not populated on the 911. While pin (4) is just a ground. It is just a manual procedure and the way the warning module was designed.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #14 of 16 Old Jun 1st, 2015, 10:47 pm
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Re: Fuel gauge question

Quote:
Originally Posted by jzeiler View Post

Here is the low fuel set procedure:
1. Empty the tank and fill it with 1 gallon (or your desired quantity).
2. Make sure you have access to the diagnostic port of the Motorcycle and identify pin 3 and pin 4.
3. Turn the ignition on.
4. On the diagnostic port, short pin 3 (brown/black) and pin 4 (brown) for two seconds. (Make sure you have the CORRECT pins - you don't want to short Battery voltage to GROUND by mistake).

5. The tank reserve light should flash quickly. When the flashing ends, the calibration is complete.
+1 on Jzeilers low fuel warning light reset procedure. When I purchased my 2000 LT, the low fuel light would illuminate at half a tank. The previous owner said the dealer unsuccessfully tried twice to correct the problem. After utilizing John's procedure, the low fuel light illuminates with approximately one gallon of fuel.

Rob, 2000LT
Navarre, FL
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post #15 of 16 Old Jun 1st, 2015, 11:20 pm
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Re: Fuel gauge question

I'm guilty of putting the fuel nozzle in the fill hole and having it bend the side of the float tube. I didn't let go of the nozzle, but it still dinged the tube. I don't recall having to remove the left side tupperware, but did take off the right upper and move the stingray out of the way, didn't have to disconnect it tho. You don't need to empty the tank either as the unit comes out at the top of the tank, I used a dowel to "rub" the ding out of the tube, and it has worked great every since. Or you can just remember that the fuel level is what it is, and work with it as such, like remembering that the speedo is 5mph fast

RICH CANNON
2000 K1200LT "a great ride"
2002 GL1800 powerful, but boring..(gone)
1979 XS1100 (gone)
1986 VT500 Ascot (gone)
1972 Honda 500-4 (gone)
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post #16 of 16 Old Jun 1st, 2015, 11:36 pm
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Re: Fuel gauge question

Or remember that at 200 miles start eyeballing a gas station, and at 225 start praying for one.

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1981 KAWASAKI KZ1000ST (SOLD)
1991 HARLEY SPORTSTER 883 (SOLD)


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