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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Electrical - Battery, Charg Sys, Lights, Switches, Sensors & Guages » Archive through March 14, 2008 » How smart is the computer on an XB? « Previous Next »

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Jaydub
Posted on Wednesday, December 19, 2007 - 07:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Quick question on the XB ECM

Will it know if there is poor spark?

Will it know if a cylinder is not firing.

I only ask, as it has been a little colder here in NC 35-40ish, and i have been bundling up for the weather.

With my ears covered, this thing sounds real tame, (sounds like a completly different bike) even though it still flies : )
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Blake
Posted on Wednesday, December 19, 2007 - 03:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No, not really. The only effect will be cylinder head temperature and exhaust oxygen content will be affected and sensed, but I don't think the ECM has any ability to diagnose the reason for the effects.

If it is running well, then you are good to go. The engine mechanical noise will significantly diminish in cooler ambient conditions.
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Jaydub
Posted on Wednesday, December 19, 2007 - 07:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

thanks blake - i was beginning to think i was losing my mind, but another jaunt today proved it is running correctly, just not (the same sounds) what i was used to in the warmer weather.
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Oldog
Posted on Saturday, December 29, 2007 - 11:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The older ECMs can detect broken wires and shorts, out of range and open circuits, intermitting and skewed no
secondary on the hv side no.
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Id073897
Posted on Sunday, December 30, 2007 - 02:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The ECM monitors all sensor lines as well as fuel pump, fan, injectors and AMC (if applicable) feedbacks and the primary sides of the coils for voltages out of range.

Regards,
Gunter
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