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2008 Yamaha R6S High Speed Misfire/Stumble (Read 536 times)
Tom Roberts
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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #15 - Feb 15th, 2017 at 3:05pm
 
RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
I am pretty confident with this diagnosis. I am also confident that this would not have been found without the Pico.


That bike is what prompted you go get a Pico eh?  Nice maiden voyage for you.  It would seem you are onto something here.

Please post up the other files when you get a chance.  After you moved the coil and that one of secondary with primary voltage and current if you get it.  Might be helpful for the next one.  Just idle would be fine on that one. 

Resistance tests of coils are virtually useless.  If this had been an inductive discharge ignition system we would have known better what to do and look for but, at least for me, this is an unfamiliar system.
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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #16 - Feb 16th, 2017 at 7:45pm
 
RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
It would seem that is a #4 bad coil. It tests fine with a meter. Book calls for 4.8-7.2K ohms and it tests at 7.0k ohms but is missing on the screen as you pointed out.


Dynamic testing is where it's at!

RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
I switched cylinder 4 coil with cylinder 3 and the problem transferred!


Cool! How about showing us that capture.

RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
I would say that proves that the coil that appears to be good with the meter is proven bad with the scope wouldn't you guys agree?


Sure does about 99%   Smiley

RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
I am pretty confident with this diagnosis.


As well you should be. You pretty much proved it.   Cool

RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
I am also confident that this would not have been found without the Pico.  Cheesy


You may have found it without it after how many hours of trying an educated guess from the gut. Changing a bunch of parts that may not of been needed... Adjusting a bunch of setting that didn't really need to be adjusted and who knows the wear and tear on the dyno and bike with the tests that came up empty. Add to that all the hours that netted no income and the stress that come with that. And how about the hours of work that didn't get done chasing this issue down...

I'd say you made a good investment. Even better was the great idea of where you bought it which put you on here with all us other nut cases!   Cool

Glad to hear you got it figured out.

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RedlinePowersports
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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #17 - Feb 19th, 2017 at 8:50pm
 
Thanks Spence! I will be working on getting the repaired bike waveforms up here once I get the new coil.

The only reason I didn't post the capture of the coil switched from cyl #4 to cyl #3 was because they look the same but just one cylinder over.

On a side note how do I post a waveform screenshot like Tom did earlier in this thread?
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StitchB
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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #18 - Feb 20th, 2017 at 5:26am
 
RedlinePowersports wrote on Feb 15th, 2017 at 2:38pm:
Book calls for 4.8-7.2K ohms and it tests at 7.0k ohms


Ohm testing?, my mother always said, if you don't have anything nice to say, don't day anything. Maybe I already said to much, JMO.
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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #19 - Feb 20th, 2017 at 5:29am
 
Tom Roberts wrote on Feb 15th, 2017 at 3:05pm:
That bike is what prompted you go get a Pico eh?  Nice maiden voyage for you.  It would seem you are onto something here.


Redline, your going to love this tool, every bike shop should have one with all the latest Can Bus and stuff, just is a no brainer, but my guess is you will have the only one for miles.

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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #20 - Feb 20th, 2017 at 5:55am
 
RedlinePowersports wrote on Feb 19th, 2017 at 8:50pm:
Thanks Spence! I will be working on getting the repaired bike waveforms up here once I get the new coil.


You're welcome! Looking forward to the after capture as well as the dyno results.   Cool

RedlinePowersports wrote on Feb 19th, 2017 at 8:50pm:
The only reason I didn't post the capture of the coil switched from cyl #4 to cyl #3 was because they look the same but just one cylinder over.


And that is just the thing we like to see. This shows your result and helps prove it out.

If someone in the future is reading this they can see how you did it and what it looked like.

RedlinePowersports wrote on Feb 19th, 2017 at 8:50pm:
On a side note how do I post a waveform screenshot like Tom did earlier in this thread?


There are more then one way to do it. I hit "print screen" on my keyboard then I open "paint". From there paste it in, do what you want to it, save it and then post it.

Enjoy your day!

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Tom Roberts
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Re: 2008 Yamaha R6S High Speed Misfire/Stumble
Reply #21 - Feb 20th, 2017 at 9:43am
 
RedlinePowersports wrote on Feb 19th, 2017 at 8:50pm:
how do I post a waveform screenshot like Tom did earlier in this thread?


We all have different ways of doing this.  I like to go to Pico Edit/Copy Entire Window as Image.  Then I paste that into IrfanView image program and add notes, arrows and such.  Save that image as a jpeg and attach it here like anything else.  Then it appears at the bottom of the post.

More details here:

http://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1330357236
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