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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Triple checking to cover my a$$



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      09-28-2020, 02:05 PM   #1
ky0u
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Triple checking to cover my a$$

I was doing a medium pull yesterday and all of a sudden my SES came on and car started misfiring. No Limp. Pulled codes and found misfire on Cyl 6

Restarted car, issue persisted. Just changed my plugs about 7k ago. So i went to check the coils by swapping cyl 6's coil into cyl 4. Re tested and sure enough, error was now showing misfire on Cyl 4. So I'm about to go ahead take this opportunity to upgrade all 6 with the PR set.

But before I do, I figured i'd ask, is there any chance the coils might not be the issue?
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      09-28-2020, 02:49 PM   #2
iqraceworks
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Quote:
Originally Posted by ky0u View Post
I was doing a medium pull yesterday and all of a sudden my SES came on and car started misfiring. No Limp. Pulled codes and found misfire on Cyl 6

Restarted car, issue persisted. Just changed my plugs about 7k ago. So i went to check the coils by swapping cyl 6's coil into cyl 4. Re tested and sure enough, error was now showing misfire on Cyl 4. So I'm about to go ahead take this opportunity to upgrade all 6 with the PR set.

But before I do, I figured i'd ask, is there any chance the coils might not be the issue?
Just to double check you could try moving that suspect cool to a different cylinder....if the code keeps following the bad coil, it's the coil.
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      09-28-2020, 03:56 PM   #3
ky0u
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Originally Posted by iqraceworks View Post
Just to double check you could try moving that suspect cool to a different cylinder....if the code keeps following the bad coil, it's the coil.
Got it! good idea
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      10-05-2020, 09:12 AM   #4
Saif2018
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Quote:
Originally Posted by ky0u View Post
I was doing a medium pull yesterday and all of a sudden my SES came on and car started misfiring. No Limp. Pulled codes and found misfire on Cyl 6

Restarted car, issue persisted. Just changed my plugs about 7k ago. So i went to check the coils by swapping cyl 6's coil into cyl 4. Re tested and sure enough, error was now showing misfire on Cyl 4. So I'm about to go ahead take this opportunity to upgrade all 6 with the PR set.

But before I do, I figured i'd ask, is there any chance the coils might not be the issue?
Just go with Eldor Coils if you need new coils, will save you money and does the job.
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      10-05-2020, 09:41 AM   #5
Fallenangel123
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Originally Posted by Saif2018 View Post
Just go with Eldor Coils if you need new coils, will save you money and does the job.
Agreed. Get them through fcp for lifetime warranty
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      10-05-2020, 09:59 AM   #6
mweisdorfer
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Quote:
Originally Posted by ky0u View Post
I was doing a medium pull yesterday and all of a sudden my SES came on and car started misfiring. No Limp. Pulled codes and found misfire on Cyl 6

Restarted car, issue persisted. Just changed my plugs about 7k ago. So i went to check the coils by swapping cyl 6's coil into cyl 4. Re tested and sure enough, error was now showing misfire on Cyl 4. So I'm about to go ahead take this opportunity to upgrade all 6 with the PR set.

But before I do, I figured i'd ask, is there any chance the coils might not be the issue?
Eldor Coils are the most up to date and recent version. They are also rated for 600hp i believe.
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      10-05-2020, 10:22 AM   #7
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Eldors are good quality, stock replacements. They're also known to handle modified N54s well...but, who has "rated" them to anything beyond stock power and how was this "rating" tested?
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