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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old Yesterday, 05:50 PM
adrian.crowther adrian.crowther is offline
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Location: Manhattan Beach
 
Join Date: May 2013
Posts: 3
Mein Auto: 328i
Multiple misfire on single bank (4, 5 & 6)

Hi Ladies and Gents,

(2008 328i E92, with 55K on the clock)

There has been many articles published about multiple misfires, I think I have read them all!!

Any help in my particular issue would be very much appreciated!!!

My car started playing up about 2 months ago, here is the problem

In neutral and revving the car (above 2K RPM) < all is fine.
When I drive the car and exceed 2K RPM The car starts to miss fire and the clever BMW shuts down cylinders. In fact all 3.
It is always the same 2nd bank i.e 4, 5, & 6
Issue happens hot or cold (I live in LA so never really cold)

Shutting down the engine and removing the key OR clearing the errors fixes the issue until I go over 2K RPM again.

What I have tried

Replaced both VANOS valves (they were sticking and cleaning did not solve)
Shuffled the Plugs and Coils
Removed and cleaned all injectors (but left in same order) < no leaks and all fine.

I really do not want to throw money at this without first understanding the problem, there is no more errors other than the misfire.

Thanks in advance,

Adrian
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  #2  
Old Yesterday, 06:22 PM
DSXMachina's Avatar
DSXMachina DSXMachina is offline
Non compos Mentos
Location: New Hampshire
 
Join Date: Dec 2007
Posts: 10,650
Mein Auto: 335i E92 TiAg 6MT ED
More information needed. Do you have a scanner and have you accessed BMW specific codes?

Otherwise we are all guessing, like this guess: Three cylinders in one bank and you've eliminated coils, plugs and (probably) injectors. My guess is bad Air Fuel ratio sensor. Or bad ground connection. Or plugged cat. I could go on. See what I mean?

Last edited by DSXMachina; Yesterday at 06:23 PM.
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  #3  
Old Yesterday, 07:45 PM
CALWATERBOY DUE's Avatar
CALWATERBOY DUE CALWATERBOY DUE is offline
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Location: Fog City, California
 
Join Date: May 2014
Posts: 1,420
Mein Auto: 09 E93 335i somewhat mod
Quote:
Originally Posted by adrian.crowther View Post
Removed and cleaned all injectors (but left in same order) < no leaks and all fine.

I really do not want to throw money at this without first understanding the problem, there is no more errors other than the misfire.

Ah, but how do you know there are no other errors? Be aware not all errors show on the dash - you gotta read 'em - with a BMW capable reader, NOT Autozone fer Crissakes!

Yep, it's been said many times, many ways....

To read all the codes
Is very bold
The info will bring
Ya in from the cold

Dude! The holiday season's bringin' on a Haiku....don't get me started!

Oh, and you know what to do about injector/plug troubleshooting.

.

Last edited by CALWATERBOY DUE; Yesterday at 07:47 PM.
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  #4  
Old Today, 04:59 AM
fdriller9 fdriller9 is online now
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Location: NJ/Philly
 
Join Date: Oct 2006
Posts: 3,700
Mein Auto: '06 AW 330xi
My bet is the up stream o2 is bad on that bank.
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  #5  
Old Today, 06:03 AM
DSXMachina's Avatar
DSXMachina DSXMachina is offline
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Location: New Hampshire
 
Join Date: Dec 2007
Posts: 10,650
Mein Auto: 335i E92 TiAg 6MT ED
Quote:
Originally Posted by fdriller9 View Post
My bet is the up stream o2 is bad on that bank.
Yep. And a graphing scanner would show that in seconds. Seems he would have a CEL for that with STFT locked at max adaptation. Are you thinking the A:F is signalling rich and he's ending up with a lean miss?
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