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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 > WTF is this?!!



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      06-13-2013, 09:24 AM   #1
Bstone
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WTF is this?!!

So I've been having problems with cylinder 6 misfiring lately. I decided to swap the coil and check the plug. This was sitting on top of the plug. WTF?!

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      06-13-2013, 09:26 AM   #2
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piece of the coil?
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      06-13-2013, 09:43 AM   #3
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Looks just like this:
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      06-13-2013, 09:50 AM   #4
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yeah probably that but how the hell did it get there? if its the injector than is not sitting tight hence missfire...
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      06-13-2013, 09:52 AM   #5
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The misfire hit the plug so hard that the coils' tooth fell out!

It's probably a jimmy rig used by one of the engineers to close the gap between the coil and the plug.
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      06-13-2013, 10:10 AM   #6
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That's crazy, I looked at the coil and didn't see anything strange, but ya it does look like that piece in the picture. Weird.
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      06-13-2013, 10:14 AM   #7
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That peace keeps the injector in a certain direction. If you over tighten the fuel line that connects to the injector you could brake this peace off and fall on top of spark plug.

And MAYBE if the injector is twisted, that's what's causing the misfire?
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      06-13-2013, 12:15 PM   #8
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^nice... that seems to be your answer right there.
so what you're telling me if that its not a tooth?
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      06-13-2013, 04:12 PM   #9
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Quote:
Originally Posted by Bimmer305 View Post
That peace keeps the injector in a certain direction. If you over tighten the fuel line that connects to the injector you could brake this peace off and fall on top of spark plug.

And MAYBE if the injector is twisted, that's what's causing the misfire?
I have no codes so far but if I get any I probably just need to replace the coil and possibly adjust the injector positioning?
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      06-13-2013, 04:57 PM   #10
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Quote:
Originally Posted by Bstone View Post
I have no codes so far but if I get any I probably just need to replace the coil and possibly adjust the injector positioning?
If you keep getting misfires, make sure the injector missing that peace is in right direction.

If everything is fine then follow http://www.e90post.com/forums/showthread.php?t=631829
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      06-13-2013, 04:59 PM   #11
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U need to find out where that piece belong, if its the injektor u need to remove it/replace it.
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      06-13-2013, 05:45 PM   #12
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I've had that happen before and found those things.
There is still alot of pressure on the injector holding it down.

I don't think that would cause misfires. There's a pretty tiny weld joint that holds that tab in place in the Injector.
Have the injectors ever been replaced?
Get some pics of the injectors positions?
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