Bad Coil Packs - Yamaha R6 Forum: YZF-R6 Forums
 
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post #1 of 6 (permalink) Old 08-02-2007, 06:36 PM Thread Starter
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Bad Coil Packs

Hey guys, I'm having stumbling issues with my bike. I'm thinking its the coil packs. The bike does have the newer mitsu coils. My question is, is there any visual way to confirm the coil packs are bad ? Some sort of discoloration on them ?

All of my coils seem to have this spot of discoloration on them.



...do you guys think I should just go ahead and replace them ?
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post #2 of 6 (permalink) Old 08-02-2007, 11:37 PM
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Re: Bad Coil Packs

not sure if i know the complete answer for you since i cant see the whole coil. however i just got mine replaced on my '03 (the year there was a recall on them) anyhow so you can see in the ATTACHED pics that there is a burn mark around the entire coil....also if you look closely you can see some damage foam where the current was arcing to the cylinder head!!!!!

i am going to do a complete write up sometime soon when i get the chance so people can see this, but hope this helps....let me know
Attached Images
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Quote:
Originally Posted by fyrefyter0143
the R6 is like a drunkin prom date...it can be taught to do anything
Damn bitch you stupid fly lemme pull up to yo bumper an smack dat monkey
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post #3 of 6 (permalink) Old 08-02-2007, 11:38 PM
I spank my R6
 
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Join Date: Jun 2007
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Bike: '03 R6
Re: Bad Coil Packs

btw just so you understand...the top color doesnt matter, what you want to look at is the metal in the middle....



Quote:
Originally Posted by fyrefyter0143
the R6 is like a drunkin prom date...it can be taught to do anything
Damn bitch you stupid fly lemme pull up to yo bumper an smack dat monkey
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post #4 of 6 (permalink) Old 08-03-2007, 02:36 AM Thread Starter
I wanna go FAST !
 
Join Date: Jun 2007
Location: Central NJ
Posts: 95
Bike: '04 R6
Re: Bad Coil Packs

Ya none of the coils have any burn marks like in the pics you provided. Although I did check the resistance on the coils, and the primary resistance on all 4 is not with in check, but the secondary resistance on all coils seems to be fine.

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post #5 of 6 (permalink) Old 08-03-2007, 06:05 AM
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Join Date: Jun 2007
Location: Maryland
Posts: 473
Bike: '03 R6
Re: Bad Coil Packs

hmm well there is still a chance there is something wrong internally....if you are having 'stumbling' issues then you are probably misfiring in one or all the cylinders at some point, the most likely problems could be your spark plugs or your coils.....or BOTH i would just replace all of those and see where that gets you...



Quote:
Originally Posted by fyrefyter0143
the R6 is like a drunkin prom date...it can be taught to do anything
Damn bitch you stupid fly lemme pull up to yo bumper an smack dat monkey
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post #6 of 6 (permalink) Old 08-03-2007, 09:35 AM
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Re: Bad Coil Packs

If you change the plugs make sure to check the gap, even if the guy in the store says there pregaped. Measure them yourself. I've gotten plugs and the guy in the store said there all good and when I got home the gap was way off. If the gap is not right the bike won't run right. Plus make sure the coil pak/ plug boot is all the way in and is seated right. Other than don't dunno.
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