E90Post
 


E92-lighting
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Low Load Multiple Misfire and Stumbling



Reply
 
Thread Tools Search this Thread
      05-12-2013, 02:00 PM   #1
pits200
Lieutenant Colonel
 
Drives: 09 335i X-Drive Black Sapphire
Join Date: Mar 2010
Location: Pittsburgh

Posts: 1,898
iTrader: (0)

Low Load Multiple Misfire and Stumbling

About a month ago I had to change injector 4 due to a failure. All my plugs are new and it doesn't appear any other injectors are an issue.

For the past few weeks I get a stumbling at low load at about 1700rpm going up a hill. Then after awhile the car will just throw a bank 1 multiple misfire cylinder 1,2,3. I am also getting some o2 codes.

So my question is, it doesn't appear to be coils, plugs or injectors. Has anyone ever had a failing o2 sensor and what were your symptoms.

Symptoms
1.) Occasionally higher than normal idle
2.) Rough Idle
3.) Multiple Cylinder misfire with codes and o2 codes
4.) Very random afrs when logging. Bank 1 will idle at like 16 while bank 2 will be 10.

Any suggestions are appreciated.
Thanks
pits200 is offline   United_States
0
Reply With Quote
      05-12-2013, 02:48 PM   #2
Ænema
Captain
 
Drives: BMW
Join Date: Aug 2012
Location: Arizona Bay

Posts: 961
iTrader: (0)

I've never had an O2 sensor go out but that definitely sounds like what I would imagine it would do.
Ænema is offline  
0
Reply With Quote
      05-14-2013, 06:08 PM   #3
pits200
Lieutenant Colonel
 
Drives: 09 335i X-Drive Black Sapphire
Join Date: Mar 2010
Location: Pittsburgh

Posts: 1,898
iTrader: (0)

Update: Replaced both precat o2 sensors and am getting an 11421 code and 11390. Not sure what these are if anyone can help. I accidentally banged one of the o2 sensors and I'm not sure if the 11421 code is something to do with a damaged sensor. Also, my afrs are all over the place for bank 1 and bank 2 is completely flatlined.

Any help is appreciated.
pits200 is offline   United_States
0
Reply With Quote
      05-14-2013, 06:31 PM   #4
Carl Morris
Captain
 
Drives: 2008 335xi 6MT
Join Date: Feb 2012
Location: Boulder, CO

Posts: 638
iTrader: (0)

I'm sorry I don't have any advice, but I'm following this because I may be in a similar boat. I had an injector stick open and a bank of three got replaced as a result. Since around that same time it has acted like it's running lean...especially on cold starts and in cold weather. I've been wondering if the O2 sensors have started lying to the ECU causing me to run lean and get misfires as a result. I have a Cobb installed and the misfire codes masked out so I feel them but I don't get the codes and CE lights. I do need to log more...I've been lazy on that and normally only log one bank.
Carl Morris is offline  
0
Reply With Quote
      05-15-2013, 06:22 AM   #5
DR-JEKL
Lieutenant Colonel
 
Drives: Space Grey 335i 6MT
Join Date: Jul 2012
Location: Newcastle Ozstraylia

Posts: 1,866
iTrader: (1)

Quote:
Originally Posted by pits200 View Post
Update: Replaced both precat o2 sensors and am getting an 11421 code and 11390. Not sure what these are if anyone can help. I accidentally banged one of the o2 sensors and I'm not sure if the 11421 code is something to do with a damaged sensor. Also, my afrs are all over the place for bank 1 and bank 2 is completely flatlined.

Any help is appreciated.
Did you reset adaptations after installation of the new sensors?

Also how many miles are you at (a walnut blast of the intake may help?)

Do you have a rough idle?

If so you may have the sensors in the wrong position.
DR-JEKL is offline  
0
Reply With Quote
      05-15-2013, 07:31 AM   #6
Nigelo
Lieutenant
 
Drives: E92 335i se
Join Date: Aug 2011
Location: Northern Ireland

Posts: 528
iTrader: (1)

11421 is hexadecimal for 2C9D:

2C9D Lambda probe heating in front of catalytic converter 2, input signal


11390 is hex for: 2c7e

2c7e Lambda probe behind catalytic converter, trimming control



Sounds like there's still something going on with those O2 sensors, I've got similar symptoms when my primary bank 1 sensor died, but with slightly differing circumstances.
Nigelo is offline  
0
Reply With Quote
      05-15-2013, 07:34 AM   #7
pits200
Lieutenant Colonel
 
Drives: 09 335i X-Drive Black Sapphire
Join Date: Mar 2010
Location: Pittsburgh

Posts: 1,898
iTrader: (0)

Update:

THanks everyone for the input, my stupid ass forget to push the bank 2 o2 sensor harness all the way in under the engine cover.

Problem fixed.
pits200 is offline   United_States
0
Reply With Quote
      05-15-2013, 10:56 AM   #8
Carl Morris
Captain
 
Drives: 2008 335xi 6MT
Join Date: Feb 2012
Location: Boulder, CO

Posts: 638
iTrader: (0)

Do me a favor and post again in a few weeks regarding any misfires and such. When they did my battery cable recall recently mine ran really smooth for a few days but then started to get rougher again. I don't know if it was just the ECU reset that changed or if something else did.
Carl Morris is offline  
0
Reply With Quote
      05-15-2013, 03:01 PM   #9
pits200
Lieutenant Colonel
 
Drives: 09 335i X-Drive Black Sapphire
Join Date: Mar 2010
Location: Pittsburgh

Posts: 1,898
iTrader: (0)

Quote:
Originally Posted by Carl Morris View Post
Do me a favor and post again in a few weeks regarding any misfires and such. When they did my battery cable recall recently mine ran really smooth for a few days but then started to get rougher again. I don't know if it was just the ECU reset that changed or if something else did.
Funny thing is all this kind of started after the battery cable recall was done, I'm guessing just coincidence.


Also, I can confirm that the much cheaper pre-cat o2 sensor which is like $108 on amazon works on both bank 1 and 2. I now have two black wired o2 sensors and no errors.
pits200 is offline   United_States
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 11:13 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST