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Ejbeert
| | Posted on Monday, December 05, 2011 - 09:27 am: | 
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spit balling part two
I've never had this problem myself but given the discussions on this forum I would be hard pressed to rule out the ecm.
I think I'd be inclined to give Al at american sport bike a call or even drop an email on ebr. New ecm and tps reset at least you would know. |
Buewulf
| | Posted on Monday, December 05, 2011 - 10:46 am: |
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Thanks Ejbeert. I've tried the ECM all over the place. The pins seem fine, too. The harness is not that sensitive. Unless the bike is fully warmed up with the fan running, I can't get it to misbehave at all. That said, I still haven't ruled the ECM out (or the harnesses). I have been busy lately, but I should have some time this weekend to take the bike apart again and start from square one again. |
Testcase
| | Posted on Friday, December 09, 2011 - 06:00 pm: |
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Shop called me today and said it was the BAS connection. Guess we'll see when I pick it up. |
Loves_to_ride
| | Posted on Friday, December 09, 2011 - 11:52 pm: |
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I just had a very similar problem resolved. Ground wire on ECM. See my prior post. Call Pensacola H-D and talk to them and they may be able to help. Have always been good to me. |
Electraglider_1997
| | Posted on Saturday, December 10, 2011 - 11:45 am: |
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Testcase,
They've got a Buell Dart Board. The dart apparently hit and stuck to "BAS". Next week the techs dart might hit "Ground". |
Testcase
| | Posted on Saturday, December 10, 2011 - 01:47 pm: |
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I know right. Here's hoping they got lucky.  |
Buelet
| | Posted on Sunday, December 11, 2011 - 11:21 am: |
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Buewulf,
A buddy of mine had very similar problems with his '06 Uly most of this summer. The bike was in & out of the shop all summer.
First they said it was the exhaust valve, then back for ECM. Next they "discovered" a bad wire in the harness somewhere & fixed it.. Then (gotta be happy they keep trying) just went ahead and ordered a new harness. Still no joy. Along the way, they also did TPS resets, checked for intake leaks, plugs, wires, etc.
He just started riding this summer. So while we were down in his state riding with him towards the end of summer and after the last fix attempt, we swapped Ulys. (It was actually running well all day & then towards the end of the day, it started doing it again.) I wanted to see what it was doing for myself and also make sure that there wasn't some "weird riding habit" that might be causing it. All was well at first & then it started doing it for me as well. Hmmm...
I didn't bring my laptop with me, but I wished I had because I was still skeptical about their TPS reset and wanted to try it myself. After spending considerable time reading the BadWeb over the years, I suggested to him that when he takes it back in that he just have them replace the TPS and / or fuel pump, because I suspect intermittent issues with one of them.
He took it in & just told them to replace both items and WHAT DO YOU KNOW?! He's now put he most miles on it since the first 4,000 trouble free miles when he first got the bike, before it started acting up. So far, so good.
On top of that, the dealership was very good to him & ended up covering everything they did & tried under warranty somehow. He was ready to trade it off and take his losses. Now he's glad he didn't.
I wish I knew if it was the TPS or the fuel pump that fixed it, but you might try swapping those out if you have access or the $$ to gamble...
Best of luck! |
Buewulf
| | Posted on Tuesday, December 13, 2011 - 04:43 pm: |
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Thanks Testcase. I actually have a BAS on order as I have begun throwing darts at the problem myself. I hope it fixes it.
Buelet - I saw on a more recent thread describing an issue similar to mine that a TPS replacement resolved two such issues. That will be my next dart. Thanks. |
Ratbuell
| | Posted on Tuesday, December 13, 2011 - 07:42 pm: |
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YOU CAN TEST A TPS.
If you have a voltmeter with a needle (NOT digital), or can get one, the test is easy. Simply hook the probes up to the TPS pins so they read resistance.
SLOWLY open and close the throttle.
The needle on the VOM should move gracefully and steadily. If it spikes, or drops - you have a dead spot on the TPS and it's time for a new one.
It's a potentiometer. A volume knob. Ever have a scratchy stereo, and you had to turn the volume either up or down to get rid of it?
Same thing.
And an easy test. |
Buewulf
| | Posted on Wednesday, December 14, 2011 - 03:11 pm: |
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Thanks Ratbuell. I beleive I have an analog voltmeter in my shop. I'll give it a go. |
Buelet
| | Posted on Wednesday, December 14, 2011 - 03:27 pm: |
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Ratbuell - Of course a TPS can be tested fairly easily and that's definitely good info on how to test.
So I'd add to all those who may be concerned that in the spirit of this issue, which seems to be an intermittent problem. The TPS may bench test OK and then act up as it warms up. (The little coil spring inside heats up of vibrates around and makes / breaks contact, but works fine at rest.) Kind of like a light bulb with a broken element. Sometimes if you bump or shake it, it'll make connection and work again for awhile.
BTW - I'm always in favor of testing VS throwing darts or swapping parts. Just wanted to relay what a dealership finally did to solve my buddy's problem. I wish I could have tested the "bad parts", just to know for sure...  |
Djohnk
| | Posted on Wednesday, December 14, 2011 - 04:05 pm: |
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Thanks for the tip Ratbuell, I have been suspecting my TPS has a "dead" spot coming off it's zero or idle, and was going to buy one just to replace it.
Now I can test it instead of possibly throwing away my $$$'s on something I don't need. |
Testcase
| | Posted on Monday, December 19, 2011 - 09:36 pm: |
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Thanks for the tip on the TPS test. I'll be giving that a go when I get back to Utah after the holidays!
Chuck
http://www.wheelnerds.com |
Electraglider_1997
| | Posted on Tuesday, December 20, 2011 - 09:48 am: |
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Treadmarks has a short tutorial that details how to mechanically fix your tps mechanism. Not to be confused with zeroing the TPS with ECMSpy. You would do the Treadmarks thing and then do the ECMSpy hot engine zeroing.
http://www.badweatherbikers.com/buell/messages/142 838/335587.html?1202706068 |
Blake
| | Posted on Friday, January 20, 2012 - 02:34 pm: |
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Any resolution for anyone here on the engine cutting out issue? I have a friend who is going through a similar ordeal. For him it only manifests when the engine is good and hot and only in the mid-range rpm area, and when in cruising mode. I think, don't quote me on that.
He's replaced a lot of sensors, ECM, and even jumpered the ground wires to the injectors. Since it's been cool, no problem, so we'd hoped the fuel injector wiring was it. Apparently the problem is back, 75o and sunny today.
EFI better than a carburetor? HAH! This is a diagnostic nightmare! |
Buewulf
| | Posted on Monday, January 23, 2012 - 07:32 pm: |
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A few people resolved a similar issue by replacing the TPS. So your friend may want to test that part is he hasn't already. No resolution yet for me, though because of the holidays and being extremely busy at work, I haven't had time to work on it.
I am going to replace the TPS (even though it tested out fine) and then the ECM (even though it tested out fine as well). I've tried everything else. I want to take one more day to go over everything again in case I missed something before taking those last two steps, but I've done that several times already to no avail, so I am not hopeful.
After I throw this last few hundred bucks at it, I am considering it a sunk cost and will just buy a new bike. |
Uly_man
| | Posted on Wednesday, January 25, 2012 - 12:39 pm: |
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"This is a diagnostic nightmare." True enough because in the shop/on the bench it will not show up many problems with the EFI like bad grounds that are affected by a moving bike. The Buell diagnostic system is also close to useless and crude.
Now I do not know if this will help any or if the dealer lied to me but with my 2010 Uly running problem the dealer did a logged run and then sent the data to HD. HD confirmed the side stand switch problem (I suspected and had confirmed this) but also a faulty rear O2 sensor. Both were replaced and the bike is fine now.
This may be worth looking into. No harm in asking is there. |
Testcase
| | Posted on Friday, January 27, 2012 - 02:51 pm: |
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No issues since the shop fixed the BAS connector and I did a TPS reset... so far. |
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