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Midnightrider
| Posted on Saturday, April 25, 2009 - 06:32 pm: |
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Spark-skip mode after 30 minutes of 75mph today (93-ish temp) Stopped cooled it off for 10 minutes, same thing happens again 20 minutes later. Bad fan or bad sensor? |
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Teeps
| Posted on Saturday, April 25, 2009 - 08:32 pm: |
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There is a fan test in ecm spy. The head temp sensor is a different matter. If it's not setting a code; without an independent head temperature reading there is really no way to be sure. Either part is difficult and expensive to replace. |
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Barker
| Posted on Saturday, April 25, 2009 - 08:36 pm: |
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Damhik, a bad fan should give u a 36 trouble code but I think skip spark mode comes from the head temp sensor out of range. Irrc head temp is a 14. Getting any check engine lites, got any codes? |
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Midnightrider
| Posted on Sunday, April 26, 2009 - 08:21 am: |
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Can't remember the DIY engine code reader. I'll do a search I just don't think its the fan - as there is plenty of air moving when I'm doing 75 Once I rode it when the first fan absolutely died. High speed was no problem, didn't get the spark skip until I got into stop and go |
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Gamdh
| Posted on Sunday, April 26, 2009 - 08:28 am: |
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Try here for the codes and the DIY reader http://www.badweatherbikers.com/buell/messages/327 77/64701.html |
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Midnightrider
| Posted on Sunday, April 26, 2009 - 08:48 am: |
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thanks says fan (36). I'll get a fan and replace it - just doesn't make sense to me that a bad fan would make it go spark/skip at highway speeds |
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Teeps
| Posted on Sunday, April 26, 2009 - 10:38 am: |
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Midnightrider Posted on Sunday, April 26, 2009 just doesn't make sense to me that a bad fan would make it go spark/skip at highway speeds The fan blades must turn, either by the motor or windmilling, otherwise they are a giant restriction. |
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Midnightrider
| Posted on Sunday, April 26, 2009 - 08:38 pm: |
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teeps - I've got a drummer plus I usually wear earplugs. I have no idea if the3 fan was running at highway speeds. I want to say it was running when I stopped and shut down - but all I really know is that I heard the fan motor running. I have run a homemade heat shield for years so I guess I'll have to pull it and see if the blades spin freely or if they are jammed |
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Froggy
| Posted on Monday, April 27, 2009 - 03:47 pm: |
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quote:just doesn't make sense to me that a bad fan would make it go spark/skip at highway speeds
I think the lack of airflow causing the rear jug to overheat, which then causes the bike to do a skip spark, would cause your issue. ![: )](http://www.badweatherbikers.com/buell/clipart/happy.gif) |
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Mnrider
| Posted on Monday, April 27, 2009 - 04:06 pm: |
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My fan runs on the hwy.at times if i'm going with the wind. |