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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 > Bad injector(s)?



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      10-22-2017, 12:58 PM   #1
Mitta335
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Bad injector(s)?

Hello,

I noticed some misfires(randomly) and rough idle when stop at a light.(No codes)
Replaced the sparks and coils, and did a walnutblast. But still the same.
After running some injectorcleaner, the misfires are gone. But the idle is still rough. Did a injectortest with ista(nog faults).
But i still think the injectors are going bad.

Your thoughts?
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      10-23-2017, 10:35 AM   #2
FCobra94
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Originally Posted by Mitta335 View Post
Your thoughts?
Read the ~7 other injector threads that were started, like, 2 days ago...plenty of good info in there.
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      10-24-2017, 03:33 PM   #3
panchofarrera
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Quote:
Originally Posted by Mitta335 View Post
Hello,

I noticed some misfires(randomly) and rough idle when stop at a light.(No codes)
Replaced the sparks and coils, and did a walnutblast. But still the same.
After running some injectorcleaner, the misfires are gone. But the idle is still rough. Did a injectortest with ista(nog faults).
But i still think the injectors are going bad.

Your thoughts?
Pull your spark plugs in the morning and smell for gas-fouled contacts. Is the rough idling only when the engine is cold, or is it constant?
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      10-26-2017, 07:45 AM   #4
Mitta335
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Originally Posted by panchofarrera View Post
Pull your spark plugs in the morning and smell for gas-fouled contacts. Is the rough idling only when the engine is cold, or is it constant?
Constant
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      10-26-2017, 11:24 AM   #5
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When my #6 injector failed it got worse and worse until the cylinder was just missfiring all the time.
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