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Buell Forum » 1125R Superbike Board » Archive through November 12, 2018 » Fans and fuel pump keep turning on when the bike is off « Previous Next »

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Petermcnair86
Posted on Sunday, August 12, 2018 - 11:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Like the title says, the fans and fuel pump keep activating after the bike is off. This will go on for a good 20 minutes. I understand that the fans will stay on for a second after you turn the bike off, but I don't think it's meant to keep turning on and off for xx amount of time?
Troubleshooting:
- I disconnected and reconnected the battery to see if that would do anything, but as soon as I started the bike again, it continues.
-removed and reinserted the fuze for the fuel pump, and this worked, until the bike was started again.

Video of the issue is included.

https://youtu.be/R512GxACXfM
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Desert_bird
Posted on Sunday, August 12, 2018 - 12:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

McNair, It's normal for the 1125R. Just the bike taking care of itself: The fuel pump will cycle for a while when you turn it off on a warm engine. I believe the objective is to maintain pressure in the fuel line to facilitate start up. The cycling should stop once the bike cools down below a certain threshold.

DB
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Petermcnair86
Posted on Sunday, August 12, 2018 - 03:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks, I was just concerned that it would drain the battery or something.
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Barraspalding
Posted on Sunday, August 12, 2018 - 07:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No doubt it would pull from the battery, not sure to what degree. If you are able to kick over after this occurs than its no issue.
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Froggy
Posted on Sunday, August 12, 2018 - 07:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The ECM programming for the fan and fuel pump has a low voltage cutoff, so assuming your battery is healthy it won't discharge to the point you can't restart.
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Thefleshrocket
Posted on Thursday, September 06, 2018 - 09:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I disabled the fans on after key off when my 1125R had a weak battery (it didn't take much to suck down the battery enough that the bike had problems starting) and left it that way, with no ill effects.
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Dannybuell
Posted on Thursday, September 06, 2018 - 10:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

How Did You Disable The Fans?
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Thefleshrocket
Posted on Thursday, September 06, 2018 - 11:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oh heck, I don't remember off the top of my head. It was an options somewhere in the tune file--I don't remember it being hard to find. I have it on my old laptop, and can check tonight.
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Shoggin
Posted on Thursday, September 06, 2018 - 01:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you are using the simple ECMDroid it's in ECM parameters/fan settings.

You can set key off, fan off speed based fan control, and temps there
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