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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through September 29, 2013 » ECM Quirks! « Previous Next »

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Britchri10
Posted on Friday, September 27, 2013 - 07:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

haven't ridden for 2 weeks. Last time I rode temp' was 98F (As it has been for the whole summer it seems).
Wheeled the bike out of the garage c5:30 AM, temp' 65F.
All summer the bike has run like a dream.
This AM it coughed & spluttered @ low rev's and threatened to quit when at stoplights.
BY the time I got to work (c15 miles) everything was back to normal.
I believe it was simply the ECM learning to operate @ a much lower temp'
NOTE: The bike had sat for 2 weeks but the gas was less than 3 weeks old.
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Fltwistygirl
Posted on Friday, September 27, 2013 - 10:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My bike tends to run like crap when I change elevation (I.e. fl to mn, mn to co), but generally adapts when I run it for fifteen or so minutes at 3k rpms. When we were in fl, it ran like a bat out of hades when the weather cooled. Like me, it loves the cooler temps.

Have u done the ecm relocation? Any chance it or the connections cracked over the summer? B.
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Froggy
Posted on Friday, September 27, 2013 - 10:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ECM didn't learn anything, it simply took longer for the bike to warm up. They tend to run funny when cold, but then once warm they are good to go.
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Britchri10
Posted on Friday, September 27, 2013 - 10:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have relocated the ECM & there are no cracks visible around the plugs.
It's running fine now.
I was assuming that the ECM had to adjust to the colder/thicker air following the 30 degree drop in air temp'.
The bike has c28K on it & hasn't ever given me any real problems & will hopefully continue not to do so.
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Uly_man
Posted on Saturday, September 28, 2013 - 02:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"My bike tends to run like crap when I change elevation (I.e. fl to mn, mn to co), but generally adapts". These bikes do not have a Barometric sensor and rely on the IAT and O2 sensors. As said the bike should be fine on a run.
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