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Old 11-08-2009, 07:39 PM   #61
cjack
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Quote:
Originally Posted by Hardrocker
My bike is now out of warranty and the fuel gage reads emply with the yellow warning light and flashing DTE going continuously. I am OK with using the odometer, but want to get rid of the warning light and flashing DTE.

An earlier post talked about the resistance provided by the fuel level strip. I want to install a resistor in place of the fuel level strip that will show the fuel level at something besides empy.

Does anyone have an idea as to what resistance is needed, and which pair of the four wires leading to the strip one would attach to the resistor?
The measured range of resistance dry for a new strip off the shelf is 2200 to 2800 ohms. That is measured between the two center pins, pin 2 and 3. The outside pins, pin 1 and 4 are the heater in the strip. A good heater should read 30 to 40 ohms. I don't know if leaving the heater open circuited will throw a fault.
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Old 11-08-2009, 10:34 PM   #62
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I was riding my 08 to the dealer in Long Beach for my Fuel Pump Recall (which I didnt have any problems with) and on the way up there my fuel gauge went from 1/2 a tank to 0. So, new fuel strip for me it appears. Bike has been flawless and has 13k on it.

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Old 11-09-2009, 04:17 AM   #63
JAS
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Got my '09 last week !! (Production date Sept 2009)

Fuel gauge still as useless as ever -- BMW still have not sorted this one out it seems
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Old 11-09-2009, 07:56 AM   #64
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Quote:
Originally Posted by cjack
The measured range of resistance dry for a new strip off the shelf is 2200 to 2800 ohms. That is measured between the two center pins, pin 2 and 3. The outside pins, pin 1 and 4 are the heater in the strip. A good heater should read 30 to 40 ohms. I don't know if leaving the heater open circuited will throw a fault.
What is the function of the heater?
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Old 11-09-2009, 05:35 PM   #65
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The fuel sensor is a thermistor from top to bottom in the tank, and the heater heats it but the gas cools it. So the resultant resistance is a function of the level of the gas.
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Old 11-09-2009, 07:32 PM   #66
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In general, I've found that very little on the dashboard is of ANY use to me.

Some things that appear there create cause for false panic.

Much better to just watch the road, the cagers, and the scenery.....

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Old 03-07-2010, 08:13 AM   #67
JStancampiano
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Does anybody know what the resistance readings of the fuel strip are from full to empty...Thinking of making a float system in that range (you know, old fashioned float and variable resistor)

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Old 03-07-2010, 09:46 AM   #68
cjack
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Quote:
Originally Posted by JStancampiano
Does anybody know what the resistance readings of the fuel strip are from full to empty...Thinking of making a float system in that range (you know, old fashioned float and variable resistor)

Joe
The dry resistance is about 2500 ohms plus or minus I think 300 or so. I have found that the ones at 2500 ohms new have lasted longer for me and worked more linearly. You might have to provide the heater resistance to the computer as well. It's 30 to 40 ohms. I thought that it was a thermistor element, so the resistance would go down as the tank went empty. That would be consistent with the float type gas sensors.
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Old 03-12-2010, 05:57 PM   #69
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My fuel sensor was totally knackered on my 09gs new pickup last august. The dealer - Ozzies in Chico, CA - said they couls fix it next day ( it was closing time) or when ever it would suit me - got it done on the 600 mile service with no problems since. Ozzies always keep the sensers in as they malfuction on all boxer models -maybe other models too - and was told when left standing with fuel that is a common way they fail.

Anybody looking for a good honest dealer who will look after you after you got the bike can do a lot worse than Ozzies in Chico. I wish I got the same service from Yamaha and Nissan.
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Old 03-12-2010, 07:04 PM   #70
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They fail. Period. Sooner or later no matter what history...no standing in fuel, etc. I've had four on an '08 K12S. My wife two on an '08 K12S, two on an '06 K12S.
So far...
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Old 03-21-2010, 06:04 PM   #71
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THis weekend was the first time I have taken the 07GS for a - what I would call a long trip.
First thing I noticed is the gas gauge..yeh me too.
It was full- then went to half in a breath...I was about a 100 miles into the tank..
Got closer to empty and I filled up - 2.7 gallons..
Soooooo I went on the odometer reading-
head winds- 75+ MPH.. and filled up every 150 miles... If i hadn't, my bet would have been out in west texas pushing that beast..
Ya mean I cannot trust a simple- gas gauge?

Yeh it was a good ride, Yeh it is a eater of miles.
No.. Iam always looking at the miles now..

rant off..

love the bike, hate that I should get more from it..
warranty- out this month..
dammitalltahell
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Old 03-21-2010, 06:38 PM   #72
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I've been buying BMW since 1971 and in the last 5 years they've really had some serious qc issues.
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Old 03-21-2010, 06:56 PM   #73
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It is amazing that BMW builds bikes that go around the world, but a fuel guage has this much of an issue. Having owned many bikes with no fuel guage, I always rely on the tripmeter and try to leave myself some margin. However, I have had other bikes that had a gas guage that was accurate and reliable. This seems like a pretty proven area of technology, and an inexpensive area, the kind of thing that should just work, period. It is also pretty important given the tendency of these machines to go off the beaten path.....
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Old 03-22-2010, 04:15 AM   #74
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Fuel gauge on my 07 Adv has been for amusement purposes only. Turns out mine has the float style, not the strip. Been replaced, and it's still a joke.
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Old 03-22-2010, 04:21 AM   #75
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Looks like they have not fixed this problem in the 2010 model - mine *makes* fuel. Got very sussed about it when the fuel gauge did not come down - it even added a bar or so I thought.

Had a bit of a fang 1 afternoon, hard acceleration through the gears and wow fuel gauge went all the way down and flashing lights everywhere - hey did not use *that* much fuel did I???? Went from 200+ mile range to less than 50 in a few seconds...

Dunno why the acceleration cleared it, but it did. Might make some enquiries...

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