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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » 2009 XB12X Staggers during prolonged idle, Backfires « Previous Next »

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Mcintodo
Posted on Monday, November 02, 2015 - 04:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Recently moved from Monterey California to Silverdale Washington. Since I've arrived, the XB12X has been a bit disgruntled.

On three separate occasions, the bike would fluctuate in idle, staggering between idle and nearly cutting out. Clutch was fully disengaged, so I hadn't mistakenly loaded the transmission. This morning it happened during the stop and go traffic in the queue to get into work, but raising the rev's of the engine kept it from stalling out.

That lasted until I came to a point where the Bike had to be left at idle for about 2 minutes to enter a secured gate. Trying to give the bike power resulted in a back fire, and reportedly about 3 inches of flame out the muffler. The bike stalled out, I cycled the engine cut off switch, and was able to start the bike, though there was a heavy fuel aroma. As a precaution, I rode the bike for 15 more minutes at 30-40 mph to 'clear' things out.

I've dived the archive on every permutation of rough, idle, backfire, stall, and move, and done similar through google. The closest thing I have that a possible corrective action is performing a TPS reset (know the procedure), and something about the a learning process for the 09 XB ECM.
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Akbuell
Posted on Monday, November 02, 2015 - 05:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Symptoms of being rich/poor combustion. In addition to the TPS reset, I believe there is a procedure in the manual ( which I don't have in front of me - sorry)for the 'cleaning' of the spark plugs. Might want to add that. Or put in fresh ones.

If it runs fine otherwise, a nice jaunt on a level road for 25-30mins at steady speed will allow the ECM to learn your new location.

If that doesn't work, would be time to check the air filer and inlet, and read up on the Idle Air Control unit and circuit.

Hope this helps, Dave
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Mcintodo
Posted on Monday, November 02, 2015 - 08:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Fair enough. I'll try the TPS reset and take it for a go, though finding roads sufficient for a 'level' run will be fun. May just do laps of work. Thanks for the Troubleshooting precedence path.
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Akbuell
Posted on Tuesday, November 03, 2015 - 10:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Found It ! Had to Google for the procedure, turns out it was a service bulletin for -08 models. May apply to yours.

To clear excess fuel re a flooded engine, or to 'clear' fouled plugs, Turn throttle wide open. Set stop/run switch to run. Turn ignition switch on. That should fire the plugs for about 4 sec. Make sure bike is in neutral.

There are threads in the knowledge vault about it. I went straight Google.

Hope this helps, Dave
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Akbuell
Posted on Tuesday, November 03, 2015 - 10:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also, as to the 'steady speed', the ECM looks at what the engine is doing and what it has been doing for the last little bit.

I don't know what the parameters are, but if it 'sees' large TPS changes, and large RPM changes to speed, it decides you are on a twisty road, and refers to the fuel map.

If it 'sees' small TPS and RPM changes, it decides you are cruising on a highway, and pays a great deal of attention to the O2 sensor, adjusting the fuel ratio of the entire map, to allow for elevation changes, ect.

Hope this helps, Dave
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Mcintodo
Posted on Thursday, November 05, 2015 - 10:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Following TPS reset, and about 30 minutes of easy rambling, the back fire issue and staggering during idle has been resolved. Thanks for the Troubleshooting guidance.
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Akbuell
Posted on Thursday, November 05, 2015 - 03:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Glad to hear the problem is resolved. And you are very welcome. Dave
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Reepicheep
Posted on Thursday, November 05, 2015 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Not to jinx it, but if it comes back, look at your cam position sensor for an intermittent failure.
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