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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through December 15, 2009 » Riddle me this « Previous Next »

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Krash01
Posted on Friday, December 04, 2009 - 02:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does anyone know why my CR beeps, and whirrs after it is shut off? This goes on for about 5 minutes, and in not constant but happens about once every 10 to 15 seconds
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Barker
Posted on Friday, December 04, 2009 - 03:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

fuell pump cycling.

Mine and chad's 1125s were making those sounds after a session at the last track day. It sounded like they were having a conversation.
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Orman1649
Posted on Friday, December 04, 2009 - 03:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine started that when I got the latest flash last week.

Prior to that, I had w/e flash came on it when I picked it up in Sept-Oct '08.

(Message edited by orman1649 on December 04, 2009)
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Krash01
Posted on Friday, December 04, 2009 - 03:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I figured it was the fuel pump, but, and I hate to sound like a child here, why does it do it, and is it normal?
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Tq_freak
Posted on Friday, December 04, 2009 - 03:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yea its normal and it does it to equalize the pressure in the fuel rail to reduce hard hot starts or plug fowling.
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1_mike
Posted on Friday, December 04, 2009 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Tq -

And just why does it do this...?

As soon as one turns the ignition key to the on position......hold on.....wait for it.....the fuel pump...pressures up the system...........!

So now...why does the pump need to be on when the system is...OFF..?

IF...this is true, it's a waste of the system.
But if not...another freaking myth

Mike
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D_adams
Posted on Friday, December 04, 2009 - 06:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

To prevent vapor lock in the fuel system?
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Xb1200rick
Posted on Friday, December 04, 2009 - 08:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

mine did not start that stuff until I got the new flash last week either. Must be something new
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Froggy
Posted on Friday, December 04, 2009 - 08:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)


quote:

Vapor lock (also known as vapour lock) is a problem that mostly affects gasoline-fueled internal combustion engines. It occurs when the liquid fuel changes state from liquid to gas while still in the fuel delivery system. This disrupts the operation of the fuel pump, causing loss of feed pressure to the carburetor or fuel injection system, resulting in transient loss of power or complete stalling. Restarting the engine from this state may be difficult. The fuel can vaporise due to being heated by the engine, by the local climate or due to a lower boiling point at high altitude. In regions where higher volatility fuels are used during the winter to improve the starting of the engine, the use of "winter" fuels during the summer can cause vapor lock to occur more readily.



http://en.wikipedia.org/wiki/Vapor_lock


I am not going to pretend to know if that is why the pumps are programmed to do it, but if it works I got no complaints.
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Ft_bstrd
Posted on Friday, December 04, 2009 - 08:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm sure it's completely unnecessary for the fuel pump to cycle.

The engineers think it's funny to make it do that.
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Tq_freak
Posted on Friday, December 04, 2009 - 08:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I don't think its as much to keep pressure on the system but to make sure they system doesn't over pressurize.
Once the motor is off and the fuel can heat soak it will expand. Cycling the pump lets the pressure extra pressure off.

I think this is why it will only do it for 10 min, by then its cool enough to not worry about.
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Tbowdre
Posted on Friday, December 04, 2009 - 09:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

mine stopped all that nonsense with the new flash
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Rockstarblast1
Posted on Friday, December 04, 2009 - 09:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

my dealer told me it was to help cool the system down???
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Chadhargis
Posted on Friday, December 04, 2009 - 10:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When Barker and I were at the track, his bike was talking like R2-D2 and my bike was CR2-D2. : )
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Ft_bstrd
Posted on Friday, December 04, 2009 - 10:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"Can you believe I have to roll around with that giant galoot on my back."

"I know and I thought the one on me was going to put it in the ditch every other lap. What the hell is wrong with these people?"

"I don't know, but I swear I'm going to pee a puddle of gas on their feet."

"I'm thinking about spitting him off the next tight turn. My cousin the XB9R did it, and it was hilarious!"
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Vtwinbuell
Posted on Friday, December 04, 2009 - 10:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I wonder if it has something to do with preventing the fuel in the lines from boiling. The fuel gets warmer in the tank once the bike is stopped, that is what causes the dripping. Maybe they keep the pressure up to increase the boiling point till the bike cools down.

Never mind, Froggy already covered it.

(Message edited by VtwinBuell on December 04, 2009)
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Therealassmikeg
Posted on Saturday, December 05, 2009 - 03:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

refer to service bulletin B-071 page 2...

http://www.badweatherbikers.com/buell/messages/384 2/B071.pdf
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Drhodes1970
Posted on Saturday, December 05, 2009 - 08:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine did'nt do that until I had almost 9000 mi. on it.WTF?
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Brumbear
Posted on Saturday, December 05, 2009 - 09:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You could always use Harley's newest flash for the Chromecow uber sled:


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