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Thread: Fuel Pump Allows On?!

  1. #1
    Junior Member
    Join Date
    Jul 2008
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    7
    Hi all, new to the threads, been riding Buell for about a year and love it!!
    The last post by 2003buellxb9s partially addressed the issue I having.

    Normal 1. Turn key
    Normal 2. Fuel pump kicks in
    Normal 3. Start bike
    Problem 4. Fuel pump does not go off.

    I was wondering if this could be relay related? Bikes runs fine, but I rode about 100 miles the other day and it never went off. I replaced the battery the same day and noticed the pump sounded a little weaker, but still going?

    Any thoughts?

  2. #2
    Senior Member
    Join Date
    Jan 2008
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    366
    Sure I have a question for you. If the fuel pump is not on and producing pressure to the injectors how does fuel get into the cylinders?????

    The fuel pump has to run all the time or the bike wouldn't run that is 100% normal. If you don't have fuel pressure than no fuel gets into the injectors.

  3. #3
    Junior Member
    Join Date
    Jul 2008
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    7
    I guess I should put it this way. When I first got the bike, and two other Buells I have ridden...(this is in regards to sound I could be off on mechanics)...pump comes on noticeably loud, then went off when bike fired off.

    Lately, this sounds never goes away and was not normal when I first got the bike, nor on the ones I rode at dealer.

    I understand that fuel has to be sent to injectors, etc...This sound is not normal however???

  4. #4
    Senior Member
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    Jan 2008
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    Every time I turn my bike on the pump pressurizes and then shuts off. When I hit the start button the pump turns back on and stays on the entire time I am riding the bike until I shut it off. That is 100% normal and is meant to happen. Now if your pump is making odd noises than the pump could be going, but if you are just hearing the pump the whole time while riding that is normal. Also some pumps make more noise than others and I don't know why. Mine is pretty damn loud and others are much quieter.

  5. #5
    Senior Member
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    Jun 2008
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    2,198
    My pump only comes one when I hit the run button, I wait for it to go off before starting, it usually does 2-5 seconds before the engine light goes off, I then start it and my pump does not turn on again. I ride an 08 XB12R.

  6. #6
    Junior Member
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    Jul 2008
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    My pump only comes one when I hit the run button, I wait for it to go off before starting, it usually does 2-5 seconds before the engine light goes off, I then start it and my pump does not turn on again. I ride an 08 XB12R.
    This is what I am accustomed to as far as noise is concerned. So pump suddenly changing to noisy has me concerned.

  7. #7
    Senior Member
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    Jun 2008
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    Ya that sounds a bit odd to me, Maybe LeFox has some input. But especially if your bike didnt start out doing that. Id also look into your bike Dan, im pretty sure the pump shouldn't be running the whole time u ride.

  8. #8
    Senior Member
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    Jan 2008
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    Of course the pump should be on the entire time. If your fuel pump isn't on please tell me how the fuel is getting from your gas tank to the cylinder??

  9. #9
    Senior Member
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    Jun 2008
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    2,198
    Ok well, When mine doesnt stay on. All bikes iv ever rode they turn off after a moment. and I rode every 2008 XB model before I bought my 12R and they are the same. My old '96 Yamaha FZR 600 was the same. Iv never been on a bike that the pump ran the whole time, so.....Maybe all the bikes I ever rode were broke

    Not trying to attack your theory, just sharing my experience :)

  10. #10
    Junior Member
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    Jul 2008
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    7
    Of course the pump should be on the entire time.Â* If your fuel pump isn't on please tell me how the fuel is getting from your gas tank to the cylinder??
    I don't doubt this...tell me though, when you turn the key on and flip your run switch (battery power only at this point) you hear the loud and obvious fuel pump turning on and getting fuel where it needs to be in order to fire up, it then goes off, you crank her up and ride. Not hearing the sound again...right? even though your bike is still pumping fuel to plugs, pistons, etc...

    This constant on noise is not normal, so I was hoping someone could confirm this as a problem.



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