HELP-Fuel Gauge Error after service. - BMW Luxury Touring Community
 
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post #1 of 31 Old Mar 6th, 2006, 9:50 pm Thread Starter
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HELP-Fuel Gauge Error after service.

Help
I have removed my fuel tank and replaced the fuel filter. Now the gauge is hanging up at a little more than 1/4 tank. It works fine from full to 1/4 then stops. The BC stops at the same time. I ran out of gas yesterday with the gauge showing 1/4 tank and the BC showing 126 miles left to go.

How do I fix this?

Lewis

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post #2 of 31 Old Mar 6th, 2006, 10:24 pm
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Couple of things to check.

1) vent hoses. The ones infront of the gas tank behind the right side panel. Make sure they are not pinched.

2) May have dented the fuel filler tube and the float is getting stuck



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post #3 of 31 Old Mar 7th, 2006, 12:17 am
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Fuel tank misreading

I had mine hang up and not show any gas after I filled up for the 4th time when the bike was new last year. My service rep said that he has seen a few do it and in most cases the sensor in the tank got stuck. Mine was good to go the next time I filled up. It's a mystery sometimes!

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post #4 of 31 Old Mar 7th, 2006, 6:08 am
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Fuel tank collapsed and crushed the fuel sender unit. It costs about $125 if you replace it yourself.

It is also possible to "pull out the dent" by drilling a small hole in it and use a small screw to pull the dent.

Do a canisterectomy. The canister got clogged and the tank did not vent causing the problem.

I know this....been there done that quite embarrassing to run out of gas and get towed for it
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post #5 of 31 Old Mar 7th, 2006, 12:02 pm
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Red face Been There Too

Ran out of gas on I-66. Guage said more that 1/4 of a tank. BC said 90 miles to empty. Definately no warning light. I don't know what the dealer did (he never really fessed-up) but it's not a problem anymore.
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post #6 of 31 Old Mar 7th, 2006, 1:00 pm
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I'm betting you pinched a line when reinstalling the gas tank.

When putting it back together after installing the fuel filter, did you line up the arrows on the fuel pump assembly to the tank?



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post #7 of 31 Old Mar 7th, 2006, 1:33 pm
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If you did dent your sender, it is possible to repair it by taking it apart, and rolling the dent out with an old fork tube or piece of pipe from the inside.

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post #8 of 31 Old Mar 7th, 2006, 3:37 pm
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Or, you could....

... reset your trip meter every time you fill up, and get gas when you get near the 300 mile mark.

Trip meter worked like a charm on every other bike I've owned (no, they didn't have fuel gauges) and I'm still in the habit of checking the trip meter instead of the fuel gauge on the LT.

I've never been too thrilled about drilling holes in my gas tank to pull out a dent.
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post #9 of 31 Old Mar 7th, 2006, 5:14 pm
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Quote:
Originally Posted by mobygrape
If you did dent your sender, it is possible to repair it by taking it apart, and rolling the dent out with an old fork tube or piece of pipe from the inside.
A socket also works well, especially since you can usually get one with the right outer diameter, or even work your way up from a smaller size to make it easier.

Ken
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Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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post #10 of 31 Old Mar 7th, 2006, 5:18 pm
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Paul,

He's not talking about drilling the plastic gas tank to remove a dent, it's the metal fuel gauge rod inside the tank that we're discussing.

And I also monitor the trip meter, but the only time I've ever gotten 300 miles on a tank is through Yellowstone at a strict 45 mph. At my 40 mpg average, I'm pretty much on fumes by 240-250 miles.

Ken
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Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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post #11 of 31 Old Mar 7th, 2006, 6:30 pm
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Boy, 300 miles is alot to hope for. I would not trsut that figure unless you have checked and checked and checked you mileage over a long peroid of time and then gone back and checked and checked and checked. ( or unless you live in Denver) Just my $.02.

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post #12 of 31 Old Mar 7th, 2006, 9:29 pm Thread Starter
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Grif,
I read your post and found a pinched line. I fixed it and I'm going fot a ride and see if the gauge worksl

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post #13 of 31 Old Mar 8th, 2006, 12:01 am Thread Starter
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Well that was about 80 miles and the gauge is still in the same spot. I filled it at the end on the ride and it goes up just fine.
I am leaving for Florida early Thursday and I'll have to do it Harley style.
Good thing the odometer work.

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post #14 of 31 Old Mar 8th, 2006, 6:16 am
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pinched line CAUSED the problem. Now your problem is a crushed fuel sender.

Remove tupperware including top piece. On right side of tank is an approx 3 1/2 in roundish brass plate with a quick disconnect to wiring harness. Remove it the plate (fuel gauge). If the tube is not perfectly round, that is your problem.
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post #15 of 31 Old Mar 8th, 2006, 6:47 am
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Quote:
Originally Posted by meese
Paul,

He's not talking about drilling the plastic gas tank to remove a dent, it's the metal fuel gauge rod inside the tank that we're discussing.

And I also monitor the trip meter, but the only time I've ever gotten 300 miles on a tank is through Yellowstone at a strict 45 mph. At my 40 mpg average, I'm pretty much on fumes by 240-250 miles.
Ah, my apologies. The one spot I haven't been in yet is the tank.

You guys must ride hard! I get 300 miles on a tank with ease. I guess I left my "hard riding" days when I moved from the V-twin cruisers to the LT. BTW, I do get some strange looks standing next to the LT with $7,000 worth of tattoos on my body...
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post #16 of 31 Old Mar 8th, 2006, 1:44 pm
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In yellowstone I got close to 60 mpg and close to 350 miles on a tank. My normal about town is 45-48 mpg and 300 miles per tank. Riding to ccr averaging 90 mph I only got 35-38 mpg and only 225 miles per tank.

Amazing difference between riding styles and year of bikes as others have mentioned different ranges.

Be careful when judging gas fills on milage.

When my tank crushed my sender, I was using the miles per tank rule and I ran out. With the tanking reading 1/3 full I ended up getting towed because, I could not be out of gas. Right?

Very expensive gas fill.
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post #17 of 31 Old Mar 8th, 2006, 2:49 pm
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Quote:
Originally Posted by rickcavanaugh
In yellowstone I got close to 60 mpg and close to 350 miles on a tank.
I wonder what El Jeffe's gas mileage was in the park?



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post #18 of 31 Old Mar 8th, 2006, 3:44 pm
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Quote:
Originally Posted by grifscoots
I wonder what El Jeffe's gas mileage was in the park?

Was there a performance award involved?
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post #19 of 31 Old Mar 8th, 2006, 11:49 pm Thread Starter
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That's probably right. I will pull it when I get back from Florida next week.

Thanks

Lewis

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post #20 of 31 Old Mar 23rd, 2006, 5:00 am Thread Starter
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>>pinched line CAUSED the problem. Now your problem is a crushed fuel sender.




I pulled the sensor and sure enough the tube is bent about half way up.
Now I need to ask another question.

How do I take it apart? I'm a bit leary of just starting to bend tabs out of the way.

Thanks

Lewis

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post #21 of 31 Old Mar 23rd, 2006, 8:01 pm Thread Starter
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Does anyone know how to taqke the fuel sensor apart? I just don't see how to start with out prying on something.
I know it is probably obvious, but I need help.

Lewis

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post #22 of 31 Old Mar 24th, 2006, 9:09 am
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Most have posted that they drill a small hole and "pull" the dent out with a sheet metal screw and pair of pliers. I have not looked at one yet. You just need to get the dent out enough to free up the float.

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post #23 of 31 Old Mar 24th, 2006, 4:07 pm Thread Starter
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I saw that in the archives. I guess I'll try it, but as clumsy as I am, I guess the thought of drilling into something unknown is a tad scary. If I had a diagram that showed what was inside the tube, I wouldn't be as hesitant.

Lewis

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post #24 of 31 Old Mar 24th, 2006, 4:21 pm
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Lewis,

I believe it is a protective tube to dampen the float movement in side. Worst case you can get a new one from Chicago BMW for $120. Just drill a small hole and don't let the bit go too far into it. Hold it such that the float inside is away from the dent and free (not wedged against it).

Come on some one who has actually done this please chime in and give him some confidence

John
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post #25 of 31 Old Mar 24th, 2006, 9:11 pm Thread Starter
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Too late now. It is either right now or I 'm shopping for a new one. I drilled a small hole, took a battery powered screw driver and screwed the screw in about half way. I then took a pair of pliers and rocked it out till the screw broke loose.
The float slid up and down freely and I put it back together.
I'm working on the lights now and will get it back together tomorrow night and try it out.

Lewis

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post #26 of 31 Old Mar 25th, 2006, 12:45 pm
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Quote:
Originally Posted by meese
Paul,

At my 40 mpg average, I'm pretty much on fumes by 240-250 miles.
Opps, this is making me think that I am not driving like I should, I only ever get 200 miles from a tank, maybe 210 or so. Anyone else getting this?

Mark

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post #27 of 31 Old Mar 25th, 2006, 5:26 pm
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How much does it usually take to fill your bike? At 240 miles, I usually take 6 to 6.5 gallons. Let's see that's about 22.7 to 24.6 liters. And why is it liters of petrol, but miles on the road, and beer is always in pints?

Ken
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Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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post #28 of 31 Old Mar 26th, 2006, 2:37 pm
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Quote:
Originally Posted by meese
How much does it usually take to fill your bike? At 240 miles, I usually take 6 to 6.5 gallons. Let's see that's about 22.7 to 24.6 liters. And why is it liters of petrol, but miles on the road, and beer is always in pints?
Hello Ken,

Sorry, I should have mentioned that, Yes, I can fill it to 23.5 or perhaps 24 litres, never more, and they are about 5.1 or gallons.

Yes, we have a half way house now with some measurements in metric and some tradional ones in imperial.

The reason we do not move from pints is that we are terrified that we might get less in our glass

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post #29 of 31 Old Mar 26th, 2006, 2:53 pm
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Don,t forget the imperial gallon and US gallon are slightly different

1 US gallon = 3.7 L
1 Imp Gallon = 4.5 L

Don
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post #30 of 31 Old Mar 26th, 2006, 3:20 pm
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Right Don. My calculations were in US gallons (as that's what we sell here) while it looks like Mark's were in Imperial gallons. But we're still talking total miles traveled.

No matter, as the answer lies in the right wrist. Ride hard, and fuel mileage suffers. Ride more conservatively, and mileage increases dramatically. But what fun is that?

Ken
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Some people see the gas tank as half empty. Some see it as half full. All I care is that I know where the next tankful is coming from...
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Last edited by meese; Mar 26th, 2006 at 3:32 pm.
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post #31 of 31 Old Mar 26th, 2006, 6:42 pm Thread Starter
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Quote:
Originally Posted by meese
How much does it usually take to fill your bike? At 240 miles, I usually take 6 to 6.5 gallons.
I think you twist a little bit harder than I do. I usually put about 5 gallons in at 240.

Wait till you read about today's problem. I'm starting a new thread for this one.

Lewis

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