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Buell Forum » THUMPer Forum » Buell Blast Thumper Knowledge Vault » Diagnosing problems: » Runs Great , and then it doesnt... « Previous Next »

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Dwp138
Posted on Friday, June 01, 2012 - 02:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I got a used 2002 Blast from a buddy. It has a CA salvage title , and says the odometer is "not actual miles". My buddy got it from someone else and has no real background info on it.
The bike was a mess. I just put new tires on it , new battery , Dan's carb boot and intake , installed exhaust head pipe gasket (my buddy was driving it without one), Welded broken exhaust mount (it looks like its a sportster exhaust) and changed fluids.

It runs pretty good but SOMETIMES at around 70 - 75 it bogs down then goes back to running good , completely at random.

any ideas?
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Dwp138
Posted on Friday, June 01, 2012 - 03:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

also backfires SOMETIMES. like a phantom backfire , completely random
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Gearheaderiko
Posted on Friday, June 01, 2012 - 03:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does it still have CA only charcoal canister? My guess is no, it's a beer can sized black canister under the rear seat/fender. You'll need to make sure that's disconnected properly.
After that it sounds like an ignition module going bad, but in such bad shape you need to make sure everything else is good first.
Pictures?
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Gearheaderiko
Posted on Friday, June 01, 2012 - 03:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

PS welcome!
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Dwp138
Posted on Monday, June 04, 2012 - 09:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Where do i get an ignition module?? ignitech??

want specific pictures? or just a general photo?
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Gearheaderiko
Posted on Monday, June 04, 2012 - 10:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just a picture or two to get an idea of how badly your blast has been butchered. Module is available from our sponsors or a Buell/HD dealer. pt# 32687-00Y
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Gearheaderiko
Posted on Monday, June 04, 2012 - 10:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Or 32687-00YA

But I have a cross reference that lists a new part number as Y0459.11A7

So you run into any one of the 3.

(Message edited by Gearheaderiko on June 04, 2012)
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Dwp138
Posted on Thursday, June 07, 2012 - 12:38 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Got the ignition module ordered. ill let you know how it goes. ill try to get a picture too
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Gearheaderiko
Posted on Thursday, June 07, 2012 - 12:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does it still have the EPA canister? That will cause all kinds of problems (still could be the module, but thats usually the part of last resort-after you've pulled out all your hair!).
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Dwp138
Posted on Thursday, June 07, 2012 - 11:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The can has been removed. Sorry i left that out...
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Dwp138
Posted on Thursday, June 07, 2012 - 11:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Got home from work (verry hot day in Phoenix), turned the bike off , went inside a minute tried to start the bike again and i had nothing. I turned the key back off , tried again and this time it backfired and shot the carb off...hopefully the ignition module fixes this...
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Dwp138
Posted on Saturday, June 16, 2012 - 06:52 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Got the ignition module in. Seems to be running better but only had about 15 miles on the new install. The old ignition module looks melted... not sure if thats typical.

One new problem (maybe), seems like its kinda falling on its face a little when starting from a dead stop , sometimes... might just be me , but who knows.
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Gearheaderiko
Posted on Sunday, June 17, 2012 - 12:32 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check the jetting. Recheck the timing.

If you're running a non stock sportster pipe you'll probably need jetting thats different from stock.
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