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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through December 21, 2009 » 2003 Buell XB9S.......one cylinder at low RPMs.....sometimes... « Previous Next »

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Rah7777777
Posted on Thursday, October 22, 2009 - 11:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hey guys, here is the scoop!

couple weeks ago I hit some hard rain for about 30 miles. most on the highway, it was pouring like crazy, an RV pissed me off so I dropped a gear and passed him (let off at about 105) few miles later pull off the highway and hit the backroads home (still pouring out)

I get to a light and shes only on 1 cylinder. Rev to 3500 and both cylinders kick in....sometimes! mainly only 1.
Stumbly home on 1 cylinder thinking water was forced somewhere it didnt need to be.

she sat for a week then fired her up for a nice day ride. get about 50 miles out with NO probs. stop for gas and when I start her up....1 cylinder only. Give her gas and it clears up around 2500, back to idle and its just 1 cylinder again.
I made it to the highway where she ran just fine!! headed for my pops place which was closer then my house to stop and check her out. Sometimes in the city it would only run on 1 and other times just fine....
checked my plugs etc.. at pops house, couldnt find anything. rode home no probs at all......

ANY IDEAS??? damn come-and-go problems!

(just replaced plugs 200 miles ago and TPS JUST reset, AFV at 105)

Also, if it makes a difference it has
-Stock 9 motor internally
-XB12 throttle body
-XB12 Header
-catch can
-open air kit
-xopti tune in the works
when she is running on both cylinders she runs great!

THANKS!!!
-Robert
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Kilroy
Posted on Friday, October 23, 2009 - 05:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

How do you know it is running on 1 cylinder instead of misfiring/ running like crap in general?
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Akbuell
Posted on Friday, October 23, 2009 - 11:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Per Al's rules at American Sport Bike: What was worked on last? Since you recently (i.e. 4ish running hours ago) replaced the plugs, carefully check your plug wires, and make sure they are properly plugged in/on at both ends.
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Rah7777777
Posted on Friday, October 23, 2009 - 01:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well, when I replaced the plugs I also Installed

-XB12 throttle body
-XB12 header
-American Sport Bike open air kit
-catch can
-xopti tune in the works
-updated oil gear
-resealed both rocker boxes

no doubt it's only one cylinder in my mind.
Sounds like a blast with low idle when it acts up.

I just picked up new coil and wires to install.
Going to bring my tools and head out Sunday and see what happens. If she acts up I'm gonna pull the plugs right there and see how they look. As well take my palm and see if ECM SPY can tell me anything, but I doubt it.

I kinda think the coil is heat soaking, but not too sure.
Thanks!
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Sparky
Posted on Friday, October 23, 2009 - 02:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What spark plug cables are you running? If they are the original ones, there is an improved version stock cable which seals tight around the spark plug and are a little more rugged. Much less likely to short out in the wet with these.

The other mods shouldn't bring about a misfire unless you've got an intake leak wrt installing a different throttle body. That's easy enough to check out though.
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Rah7777777
Posted on Sunday, October 25, 2009 - 09:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

well just installed new plug wires and coil........

that problem is no longer there.....picked up a whole new problem!!


Since its a different issue, im going to post a new thread for it.

thanks!
-Robert
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