The sound of a failing fuel pump?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by kareblak, Dec 4, 2013.

  1. kareblak

    kareblak Adventurer

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    Hi! Had a small crash the other day. On my way out of a roundabout, I met some ice, and the bike met some tarmac. The crash bars, the luggage rack and the rear blinker took most of the fall, so I was fairly luck. Picked it up and drove it back home. Today I was planning on taking it to storage, but the beast just wouldn't come alive. The battery was good, I put in some fuel, but the only response I get when hitting the ignition button is FI priming and ONE attempt from the starter engine every couple of seconds. Doesn't seem like it's getting any fuel, or any sparks at all. I made a small video to try to describe the sound when attempting to start up. Is this a failed fuel pump, and why would this happen so sudden and not while riding?

    https://www.dropbox.com/s/psoh79g9z9jlizo/VID_20131204_104130.mp4
    This is me holding in the start switch.
    #1
  2. Boatman

    Boatman Membership has it's privileges ;-)

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    Did you ride the bike after the crash or have it transported?

    Sounds like it's hydrolocked to me.

    Not real familiar with the 990 but I'm pretty sure the reason the fuel pump keeps running is because everytime you hit the starter you are resetting the prime mode.
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  3. kareblak

    kareblak Adventurer

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    Yup, I rode the bike back. Even started it on a later occasion to check if everything was ok. It was, but not now.
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  4. Boatman

    Boatman Membership has it's privileges ;-)

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    I guess I would try a couple things. If you turn on the ignition and don't hit the starter button, does the fuel pump stop after a few seconds? Do you have the fuel taps turned on?

    Try either pulling the plugs and seeing if it turns over freely or put it in 6th gear and rock it backward a bit.
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  5. kareblak

    kareblak Adventurer

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    Yes, the sound stops like normally after a couple of seconds.

    Yup! :clap

    First one to check if I've got sparks, and the second one to check if there's anything mechanically holding it up?
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  6. Boatman

    Boatman Membership has it's privileges ;-)

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    Either one will clear a hydrolock..... I personally don't like to use the rocking backward method and prefer to pull the plugs.
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  7. kareblak

    kareblak Adventurer

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    Is it possible to bend the piston arm, like shown on wiki, by using the backward method? Sounds quite unrealistic.
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  8. Boatman

    Boatman Membership has it's privileges ;-)

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    Puts stress on the tensioner side of the timing chain. Not going to do anything to the connecting rod or chain. Never heard of any issues in a newer engine. I just like doing the plugs.
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  9. gefr

    gefr Life is a trip

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    It does not bend by pushing the bike by hand.
    The motor seems to make half a turn.
    Cheers.
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  10. kareblak

    kareblak Adventurer

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    Tried rocking it backwards in 6th gear, but it didn't work. Same sound still.
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  11. Boatman

    Boatman Membership has it's privileges ;-)

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    Hmmm,,,, went back and reread and watched the vid again... are you keeping the start button depressed the whole time and it's making those attempts on it's own or are you repeatedly pressing the button?
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  12. Leodis41

    Leodis41 I wanna Orange one!!

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    Hmm, watching the video after each half turn the instruments dim and the rev counter does a full sweep like when you first turn on the ignition.
    I would check your battery connections and voltage, it looks like too much current draw for the battery.
    #12
  13. farmboyrr

    farmboyrr Adventurer

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    My 990 is doing the exact same thing. Turn the key on and hold the starter button and it clicks every couple of seconds. Never crashed the bike. Just likes to get dirty. I road it through the summer with no issues. Put it in the garage for six weeks of corn harvest. Pulled it out to winterize the motor. Nothing. It does act like a low battery but I put a good charge in the battery and try it again, and same thing happens. Tried another battery and the same thing. My SMT sat idle for the same time but started just fine.
    No codes from the dash, just the dimming of the head light like low battery voltage. Can't find any loose connections.
    I think I'll pull the head fuse to eliminate that voltage drain and try again.
    May have to consult CJ. Maybe a couple of beers will help. At this point it surelly can't hurt.
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  14. sstewart

    sstewart Long timer

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    Nothing! Won't start,that's the sound .
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  15. Qwik

    Qwik Adrenaline Addict

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    Weak battery?
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  16. gefr

    gefr Life is a trip

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    Battery voltage, R/R voltage output, battery connections...
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  17. kareblak

    kareblak Adventurer

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    I'm holding it in. Here's another vid. Is the pump/primer sound kinda off, or is it just me?

    https://www.dropbox.com/s/22xt14duzniq3th/VID_20131207_131354.mp4

    The battery seems ok. It's stable on 12.3V and drops very little after repeated tries. Also, isn't it hard to see how this would change from one day to the next?
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  18. Boatman

    Boatman Membership has it's privileges ;-)

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    As others have suggested,,,, I think your issue is voltage. A fully charged battery at rest should be 12.6-12.8 volts. I think in that vid I can hear the starter relay clicking after each attempt. Fuel pump would have nothing to do with the engine spinning over. Initially I was leaning toward hydrolock because I didn't realize you were keeping the button depressed.

    What is the light I see flashing near the handlebar clamp?
    #18
  19. kareblak

    kareblak Adventurer

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    I'll try to charge the battery over-night and see what happens. I guess I was too unpatient the last try.

    The blinking light is the heated grips control.
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  20. Qwik

    Qwik Adrenaline Addict

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    Turn the grips off. And anything else that pulls power besides the engine.
    #20