My F800gs STALLS LIKE ITS RUNNING OUT OF GAS! PLEASE HELP!!

Discussion in 'Parallel Universe' started by chunter, Jan 3, 2009.

  1. RogerA

    RogerA Continually Confused

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    WE HAVE A RESULT !!!

    We went through VERY heavy rain today for about 45 minutes - NO STALLING - NO ROUGH RUNNING. the problem is fixed!!!

    The following is a picture of the re-routed vent line. As you can see it comes agross the bike and comes down by the kick stand switch.

    [​IMG]

    Again, thank you to Eli and the staff at BMW Denver.
    Roger
  2. anodyne

    anodyne Been here awhile

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    I'm interested in how this turns out ... regarding both resolution to issue and how the dealer handles this overall (were you credited the extra $ charged at 600 mi service?).

    I was riding above Boulder all weekend w/out issue. I did notice a slight hesitation at one light back in Denver, but no stalling. My canister has been removed and I only have a bit over 1,000 mi fwiw .... best of luck with resolution.

  3. Singletrack_mind

    Singletrack_mind Cave Man

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  4. CoydogSF

    CoydogSF Ambitious Amatuer

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    Hey All,

    Like a few others I've seen post here, I was ignoring this thread until my F800GS started stalling. Thought I would add my experience to the discussion and hope someone might have some insight:

    6/27/2009 - After 2,400 trouble free miles since being purchased in Feb, my bike began stalling a few hours into a dual sport ride in 100+ degree temps. Variety of RPM's, uphill, downhill, flat, idling, 5 mph, 25 mph, 65 mph. Made it 60 miles home with the bike stalling every 5 mins or so and it restarting usually on the second try. Interestingly, as I got back towards San Francisco and the temps dropped, the bike ran without a stall for the last 20 mins. I could not duplicate the problem on a 30 minute ride the next morning in mild temperatures.

    6/30/2009 - Bike into the dealer. They found a loose connection on the battery where I had installed the power for my Zumo and reasoned that this could be the cause. They also did an update to the OBC relating to the fuel range readings.

    7/3/2009 - Bike again began stalling about three hours into a dual sport ride. Again temps close to 100 degrees. OBC showed 60 miles or so left. Limped into town and filled the tank. After being filled, it ran perfectly for another 3 hours of dirt trails in 100 degree temps (with a passenger!). Rode it the next two days in similar temps with no problems (but at least 100 mile range on the OBC).

    7/8/2009 - Bike into the dealer. They could not duplicate the problem at any fuel levels, but I doubt they rode it long enough or in hot temps.

    7/14/2009 - I picked up the bike and assured them I could duplicate the problem. Added enough gas to get me out to Carnagie OHV. As the OBC showed about 60 miles and the air temp approached 100, the bike started stalling. I compiled the following video shot from my helmet cam to show the problem happening maybe 8 or 10 times on the ride in different scenarios.


    <OBJECT width=560 height=340>


    <embed src="http://www.youtube.com/v/inW6sCZwvH8&hl=en&fs=1&rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="560" height="340"></embed></OBJECT></P>
    After shooting this, I put two gallons in and rode straight to the dealer without the slightest hiccup. By the way, while it was stalling I tried opening the gas cap. Didn't detect any pressure build up and stalling continued.

    7/16/2009 - Heard from the dealer that they'd opened a "PUMA" (?) case for me but because they could not duplicate the problem in the shop, could not replace anything. Having read that a new fuel pump seemed to resolve the problem for people, I paid for a new pump myself and promised to bring the issue of reimbursement back up with them if after my 3000 mile trip, the pump seemed to fix it.

    7/17/2009 - Well, there goes my indignant speech because the bike (new fuel pump and all) stalled like clockwork today in high temps and with 30 miles or so shown on the OBC. I was able to stall/restart it for another 15 miles or so to a gas station. Once again, 2 gallons in and it ran perfectly all the way home.

    On Sunday, I leave for a three week trip that this bike seems purpose-built for - 3000 miles from San Francisco to CO on as much of Pony Express Trail as possible and back home via the TAT. At this point, I'm resolved to just staying above 50 miles on the OBC and carrying an extra two gallons with me for when that's not possible but would appreciate any input anyone might have that might keep me on the road. I feel that my dealer will continue to pursue the issue with me when I get back including possibly taking a long ride with me (though I don't know what that will show that the video doesn't).

    Once again, my case is *only* in hot weather after at least an hour riding and *only* with +/- 50 miles show on the OBC. Bike stalls but can be restarted and run over and over for up to 60 miles. In any case, I hope this information helps build upon the body of information related to this frustrating problem with these otherwise magnificent bikes.
  5. DolphinJohn

    DolphinJohn Caveman

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    My bike hasn't stalled since I removed the charcoal canister.

    Once the temps here in Key West starting getting up in the high 80s the bike would idle rough at cold start and stall until I ran it hard, then seemed to run fine. (Bike is stored outside in the sun under a cover.) I also had a habit (ignorance) of topping off the tank to the very top of the fill neck.

    Got caught 150 miles from home and rode through extremely heavy constant rain for nearly all of it. The bike would stall almost every time I pulled in the clutch. I had strong suction when I refueled.

    I removed the canister and the bike seems to run freer, although I have only ridden in one brief downpour since.

    Your results may vary.
  6. Stuntman

    Stuntman Been here awhile

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    Don't know...I'm lost.
    Mine just started intermittently doing the exact same thing. Low fuel (around a gallon left), hot temps, and it will quit when I chop the throttle. Then it is hard to start until I put more fuel in it. Also, no vacuum when I open the gas cap.
  7. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    cannister on or off ?
  8. Stuntman

    Stuntman Been here awhile

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    Don't know...I'm lost.
    Cannister is on and I added a "t" to avoid the stalling problem in the wet. It died prior to the t and after I put it in. What ya think?
  9. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    Remove it.
  10. ROYAL COACHMAN

    ROYAL COACHMAN Long timer

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    + 1 Take DP's advice! Since I removed mine, my stalling for the most part has ceased.
    I say that because it has had 2 re-occurances, but not in the last 1500 miles.
  11. Stuntman

    Stuntman Been here awhile

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    Why did I know you were going to say that!:rofl

    I'll give that a try and see what happens.

    Thanks!
  12. Singletrack_mind

    Singletrack_mind Cave Man

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    My bike goes to the dealer tomorrow for three recall service items (rad hose, frt. axle & new fuel level sender). While I was scheduling that I spoke with the 'service advisor' and he told me that yes, BMW is aware of stalling problems and has been interviewing dealers about their customer's experiences. The BMW rep who visited my dealership to discuss this talked about BMW developing some sort of deflector in front of the airbox inlets. (someone earlier in this thread had done something similar). It's aparently BMW's position that the wet weather stalling issues are being caused by water being sucked into the airbox from the intakes.

    Thinking about this, I recall that Motoguzzi had a simillar problem with one of their models back around 1995/6. It had straight ram air intakes and a paper filter. Tons of bikes these days have ram air systems and don't stall in the rain, so there's got to be a simple fix. I have seen drains in the intake plumbing on Honda sport bikes & assume other MFGs have them too. The key would be to stop and accumulate the incoming water before it gets into the airbox where the EPA says "no vents to the open air".

    Another thought: It would be very interesting to drive along side someone riding their GS800 in a good rain. I'd like to see how water migrates off the front of the bike. I am wondering if the angular protrusions on the sides of the "beak" might be concentrating spray from the front wheel and channelling streams of water into the air inlets. Looking at it dry, it looks possible.
  13. GB

    GB . Administrator

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    Thanks for the experimentation and video proof... We've had torrential downpours here and my 800 did not stall, but it also doesn't have a charcoal cannister. Only US spec'd bikes have them.
  14. geopsychicdude

    geopsychicdude n00b

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    Finally, at about 6000 miles my 800gs had similar stall problems. I had just finished about 15 miles on a medium rough dirt road, running in 1st 2nd and ocasionally 3rd gear, with about 1/2 tank of gas. It was a warm day about 75 degrees, no rain, elevation 8000 feet +/-. As I slowed up to an intersection, in gear, as the engine speed approached idle it stalled and locked the rear wheel and skidded to a stop. I tried starting and it resisted. So I turned the key off, then back on, then it fired right up.

    I then turned onto pavement rode about a mile and when decelerating to near idle rpm again it stalled. The same proceedure got it going. This happened about 6 times total in ten miles and then it hasn't happened again despite riding the additional 50 miles home. To me, its as if the fuel got hotter than normal because of all the low gear driving, and once it cooled down (riding on pavement) it functioned normally.

    To me its acting just like a VW rabbit that we had years ago, and it had cronic vapor lock issues whenever the tank got about half full on hot days. Until we got the fuel pump replaced, we always had to keep the tank more than half full.

    Other things to keep in mind is I do remember the last few times I've gotten gas the tank has been negatively pressurized?? I rode it 20 miles today, (street) still no new gas and no issues. The ride was to bring it in for the 6000 mile service. Mentioned it to the dealer and they acted as if they never heard of such a thing?? Also, I have had the bike on many similar rides as described in the first paragraph and never had it even think about stalling.

    So whether the problem is ordinary vapor lock (I think hightest gas is LESS volatile), a misinterpretted sensor by the internal computer, a clogged canister (should happen all the time), a oneway breather tube that isn't breathing either way, or something else, I don't know. Hope BMW figures it out before I have to walk 30 miles to cell service.

    One more possiblilty in my case could be some bad gas as it has only happened once in 6000 miles.
  15. CoydogSF

    CoydogSF Ambitious Amatuer

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    Just to amend my previous post. I'm out now on the first week of a three week trip that will include the Western TAT (less Oregon) http://www.advrider.com/forums/showthread.php?t=487054
    and am finding that with the heat and ride lengths we're experiencing through NV, UT and CO, topping off the fuel no longer fixes the problem for me. In fact, after riding through mornings, waiting out the afternoons in the shade and continuing in the evening for three days, we decided to beeline it for Salt Lake City and a dealership. They found an engine temperature reading of -95 degrees in the diagnostics that could be causing (I love this) "runability issues" and were convinced it was a bad BMSK (Bavarian Motorrad Supen Komputer?).

    We decided to blast to Denver where we could stay a night or two and have a new computer overnighted only to find once we got here that the readout was caused by a fault in the diagnostic software in SLC. Back to square one as of now but BMW of Denver is now diligently running their own diagnostics while we hang out in their super plush guest lounge. Yeah, maybe KTM's don't have this particular stalling problem but do their lounges have leather couches and big screen TV's?

    I love adventure riding... :wink:
  16. DockingPilot

    DockingPilot Hooked Up and Hard Over

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    Oh the pre FI 950's certainly did. And again, it was cannister related. Ask me how I know this.......:lol3
  17. Singletrack_mind

    Singletrack_mind Cave Man

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    Joel, that's awesome! Thanks so much for taking time to experiment & document. As I posted earlier, I did experience my charcoal canister sucking up a surprising amount of water on a rain ride & then regurgitating it on the ground over the next few hours. Combined with your video, I see this as a compelling explanation for the stalling in the rain problems. That's a powerful vacuum!

    I'll be plumbing in a "T".
  18. rbuswell

    rbuswell n00b

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    Just to add a little twist to this thread. I have a 2009 single 650 and have about 1400 miles. 1st problem was a kickstand shut off sensor going gunny bags.

    Went on a 170 mile trip last weekend. Filled my tank up at mile 30. Got the whole trip in within 1/2 mile of my house and the bike dies like it ran out of gas.

    Got it home and in the shop. The service mgr says they are looking into the fuel sensor and mentioned the fuel injection system. Says they got to get into the bike so not sure when I'll see it back.

    My ride got up to around 3000 feet in elevation and when it died I was going through some tight corners and decelerating.

    My bike would not restart and sat for a couple of days prior to getting to the shop and wouldn't start for them either. It was trying to start but wouldn't keep running.

    When you purchase a bike to take into the mtns this kind of unreliability is disconcerting to say the least.

    So the issue seems to cross over and is not exclusive to the 800??

    rb
  19. Foofighter

    Foofighter Broken Sportbike Rider

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    :clap

    Awesome reply!
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  20. WoodWorks

    WoodWorks House Ape

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    Oh yeah! :clap

    David