How much trust for the BC info... - BMW Luxury Touring Community
 
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post #1 of 12 Old Sep 1st, 2008, 11:02 am Thread Starter
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How much trust for the BC info...

The BC indicated I had 45 miles worth of gas left but I ran out sooner than that (too frustrated to figure how far I realy went) as I was on the HWY trying to get to the next gas exit. Are we to trust the BC or is there a reset I am not aware of?

Mugz

"If at first you don't succeed... well, so much for skydiving."

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post #2 of 12 Old Sep 1st, 2008, 11:46 am
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Re: How much trust for the BC info...

The BC info for remaining miles left on my 2002 seems to be very accurate since recalibrated the MPG function. Before it was recalibrated it would read 0 miles remaining when I still had 3/4 gallon left in the tank.
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post #3 of 12 Old Sep 1st, 2008, 11:56 am
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Re: How much trust for the BC info...

Not that it will help now that you have pushed the bike, but I compare the BC miles remaining to the "Low Fuel" light illuminating. Normally, the light illuminates when I have about 65 miles remaining on the BC; about 1-gallon.

BC recalibration may help. Here is the link:

BC MPG Calibration

Perhaps another help:

Calibrating the immersion-tube sensor

Note:
The immersion-tube sensor has to be calibrated if it or the fuel tank has been replaced.

Calibration allows the reserve fuel capacity of the fuel tank to be adjusted to suit customer preferences.

Pour 4 litres (0.88 Imp. gal/1.06 US gal) of fuel (or the quantity requested by the customer) into the empty fuel tank.
Connect the MoDiTeC to the diagnosis connector beneath the saddle.
Call up the TOOLBOX menu on the diagnostic unit and select the PROGRAM TANK RESERVE item.
Follow the MoDiTeC instructions.

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Last edited by wacolt; Sep 1st, 2008 at 12:02 pm.
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post #4 of 12 Old Sep 1st, 2008, 11:56 am
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Re: How much trust for the BC info...

Mine seems to be very close to correct. The other day I road 25 or so miles with the fuel light on BC said 35 miles to empty. I put 5.786 gals in the bike. with an average of 46 mpg. i'm not a math wiz but that looks purty close to me

Stevie Shreeve
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post #5 of 12 Old Sep 1st, 2008, 2:42 pm Thread Starter
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Re: How much trust for the BC info...

Quote:
Originally Posted by wacolt
Normally, the light illuminates when I have about 65 miles remaining on the BC; about 1-gallon.

.
You get 65 MPG? Wow! Obviously this would depend on your speed so I am not sure how much confidence we can get out of the low fuel light either.

Thanx for the recalibration link, I will look at it and follow your lead.

Regards...

Mugz

"If at first you don't succeed... well, so much for skydiving."

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2003 R1150GS - Yellowbird
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1991 K1100RS - Sold and burned
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post #6 of 12 Old Sep 1st, 2008, 3:41 pm
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Re: How much trust for the BC info...

Quote:
Originally Posted by Mugszy
You get 65 MPG? Wow!
Not sure why you think it strange?











Not doctored, but this was the fuel consumption on a recent ride of 150 miles where I couldn't go any faster than about 56MPH. This was because I was following 'er indoors on her S-Wing. Claims a top speed of 65 but my GPS said 54.5 was topped out!
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Just pussin' through.
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post #7 of 12 Old Sep 1st, 2008, 4:03 pm
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Re: How much trust for the BC info...

Quote:
Originally Posted by Mugszy
You get 65 MPG? Wow!
Mugz
I got this in Utah last week also have a average of 46.78 over the last 3000 miles pulling a trailer

BTW I checked mine the old way, adding up gallons from all my gas receipts from the trip divided into total miles.
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Stevie Shreeve

Last edited by katnapinn; Sep 1st, 2008 at 6:49 pm. Reason: added more info
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post #8 of 12 Old Sep 1st, 2008, 4:35 pm Thread Starter
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Re: How much trust for the BC info...

OK, so I gues I need to let off the throtle a leedle bit. I can get those numbers but averaging 41-44 mpg at 75mph.

The motto is, if the fuel light comes on... SLOW DOWN!

On the BC reset, is it the same for pre and post '04's?

Mugz

"If at first you don't succeed... well, so much for skydiving."

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post #9 of 12 Old Sep 1st, 2008, 5:09 pm
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Re: How much trust for the BC info...

Quote:
Originally Posted by Mugszy
You get 65 MPG? Wow! Obviously this would depend on your speed so I am not sure how much confidence we can get out of the low fuel light either.

Thanx for the recalibration link, I will look at it and follow your lead.

Regards...

Mugz
I may be mistaken or absent minded; but I don't get 65 mpg. Usually 52 mpg, so I guess the light comes on about then. Sorry for the misstatement; when the light comes on, I get gas and I find the BC usually agrees after I figure the gallons on the fill-up.

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post #10 of 12 Old Sep 1st, 2008, 6:39 pm
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Re: How much trust for the BC info...

65 mpg.......did u check that the old fashion way or just with the BC. My 02 runs great ,I can get 50 if I really baby her. 65 seems very high,my wifes 50cc scooter only gets 15 mpg more then that
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post #11 of 12 Old Sep 1st, 2008, 8:25 pm
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Re: How much trust for the BC info...

Quote:
Originally Posted by ltlfeat
65 mpg.......did u check that the old fashion way or just with the BC. My 02 runs great ,I can get 50 if I really baby her. 65 seems very high,my wifes 50cc scooter only gets 15 mpg more then that
Nope, not 65. 56, yes, if I don't twist the throttle on the slab. One-up, 65 mph, BC recalibrated.

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post #12 of 12 Old Sep 5th, 2008, 9:07 pm
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Re: How much trust for the BC info...

FU*# the BC (or should it be the BS?)
I wouldn't trust it for a minute except for the temp.
Do the math yourself!
Chris
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