E90Post
 


Studio RSR
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Request for help, diagnosing 30FF and 29D0 Issues



Reply
 
Thread Tools Search this Thread
      03-24-2020, 12:07 PM   #1
genebike
Second Lieutenant
genebike's Avatar
62
Rep
239
Posts

Drives: 2011 e90 335i
Join Date: Feb 2013
Location: Ponte Vedra, Fl

iTrader: (0)

Garage List
2011 BMW 335i  [0.00]
Request for help, diagnosing 30FF and 29D0 Issues

I recently installed a JB4 and now I'm experiencing some issues. Specifically:
  • 30FF - Boost Under Target; Possible boost leak
  • 29D0 - Misfirings, cylinder 4

I had the plugs and coils replaced ~2k miles ago in Oct 2019, so I'm fairly confident those are fine.

I've also replaced my charge pipe back in May 2019 with this one from ECS: https://www.ecstuning.com/b-ecs-part...t/010997ecs~a/

I'm running the latest maps from Burger as well, just updated a few days ago.

I'm sure people are going to ask for logs, which I'm happy to provide. Here's my question: under what conditions should I log in order to make diagnosing this easier? I.e. what map, what gear(s), presumably I need to clear the codes first, etc.

I have some preliminary logs here: https://www.dropbox.com/sh/a1c4l01t2...sMe5piD2a?dl=0, but I'm more than happy to produce new ones.

Last edited by genebike; 03-24-2020 at 12:26 PM..
Appreciate 0
      03-24-2020, 05:38 PM   #2
mweisdorfer
Major General
mweisdorfer's Avatar
United_States
1900
Rep
6,968
Posts

Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI

iTrader: (0)

Garage List
2007 BMW E90 335i  [0.00]
2008 bmw x5  [0.00]
Quote:
Originally Posted by genebike View Post
I recently installed a JB4 and now I'm experiencing some issues. Specifically:
  • 30FF - Boost Under Target; Possible boost leak
  • 29D0 - Misfirings, cylinder 4

I had the plugs and coils replaced ~2k miles ago in Oct 2019, so I'm fairly confident those are fine.

I've also replaced my charge pipe back in May 2019 with this one from ECS: https://www.ecstuning.com/b-ecs-part...t/010997ecs~a/

I'm running the latest maps from Burger as well, just updated a few days ago.

I'm sure people are going to ask for logs, which I'm happy to provide. Here's my question: under what conditions should I log in order to make diagnosing this easier? I.e. what map, what gear(s), presumably I need to clear the codes first, etc.

I have some preliminary logs here: https://www.dropbox.com/sh/a1c4l01t2...sMe5piD2a?dl=0, but I'm more than happy to produce new ones.
Do a smoke test
Appreciate 0
      08-10-2020, 04:15 PM   #3
genebike
Second Lieutenant
genebike's Avatar
62
Rep
239
Posts

Drives: 2011 e90 335i
Join Date: Feb 2013
Location: Ponte Vedra, Fl

iTrader: (0)

Garage List
2011 BMW 335i  [0.00]
Resurrecting this as it's still going on. I did a smoke test at my local shop and no leaks were found. Any other ideas?
Appreciate 0
      08-10-2020, 06:00 PM   #4
Saif2018
Brigadier General
972
Rep
3,219
Posts

Drives: E90 335i
Join Date: Jan 2019
Location: UK

iTrader: (0)

Quote:
Originally Posted by genebike View Post
Resurrecting this as it's still going on. I did a smoke test at my local shop and no leaks were found. Any other ideas?
Which plugs and Coils are you running?

Swap plugs round with another cylinder top see if misfire follows, then do the same for coils and check if misfire follows...

For 30FF fault, follow this guide...

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/
Appreciate 0
      08-10-2020, 07:37 PM   #5
Aceway
Captain
United_States
455
Rep
875
Posts

Drives: E82 135i / F25 28i
Join Date: Feb 2018
Location: SoCal

iTrader: (2)

If problems started right after Jb4 install, perhaps uninstall and see if it persist?
Appreciate 0
      08-10-2020, 08:37 PM   #6
genebike
Second Lieutenant
genebike's Avatar
62
Rep
239
Posts

Drives: 2011 e90 335i
Join Date: Feb 2013
Location: Ponte Vedra, Fl

iTrader: (0)

Garage List
2011 BMW 335i  [0.00]
Quote:
Originally Posted by Aceway View Post
If problems started right after Jb4 install, perhaps uninstall and see if it persist?
So I tried running the car in pass through mode, JB4 still attached, but not doing anything. The issue still presented. I left it with my shop for close to 2 weeks and it didn't happen...driving away from a $200 bill for nothing: happened right away.
Appreciate 0
      08-11-2020, 01:45 AM   #7
Saif2018
Brigadier General
972
Rep
3,219
Posts

Drives: E90 335i
Join Date: Jan 2019
Location: UK

iTrader: (0)

Quote:
Originally Posted by genebike View Post
So I tried running the car in pass through mode, JB4 still attached, but not doing anything. The issue still presented. I left it with my shop for close to 2 weeks and it didn't happen...driving away from a $200 bill for nothing: happened right away.
Did you follow the guide posted previously?

Did you swap plugs to see if misfire follows?

For boost leak issues you need to start with the cheapest, check charge pipe connections, DV valve/Bov, replace All Vacum lines if it hasn't been done recently, check vacumn canister connection points /cracks. Then check boost solenoids.
Appreciate 0
      08-14-2020, 01:09 PM   #8
dpaul
Lieutenant Colonel
United_States
654
Rep
1,893
Posts

Drives: 2009 E90 335xi, 2011 E93 M3
Join Date: Dec 2012
Location: Boston

iTrader: (3)

Failure to reach boost setpoint is likely a consequence of the misfire, not the cause of it. Forget about the possible leak for now - in any case, you've already smoke tested.

First things first. Do the coil swap as suggested above. Then do the plug swap as suggested above. If the misfire is still confined to cyl 4 after those swaps, think about an injector swap. That's slightly more involved but really not difficult - for this test I would not worry about renewing the injector seals or decouplers or even re-coding for the differences in injector flow rates. For the long term, those three items should be addressed but right now you just need to determine the source of the problem.
Appreciate 0
      08-14-2020, 01:23 PM   #9
Saif2018
Brigadier General
972
Rep
3,219
Posts

Drives: E90 335i
Join Date: Jan 2019
Location: UK

iTrader: (0)

Quote:
Originally Posted by dpaul View Post
Failure to reach boost setpoint is likely a consequence of the misfire, not the cause of it. Forget about the possible leak for now - in any case, you've already smoke tested.

First things first. Do the coil swap as suggested above. Then do the plug swap as suggested above. If the misfire is still confined to cyl 4 after those swaps, think about an injector swap. That's slightly more involved but really not difficult - for this test I would not worry about renewing the injector seals or decouplers or even re-coding for the differences in injector flow rates. For the long term, those three items should be addressed but right now you just need to determine the source of the problem.
+1
Appreciate 0
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



All times are GMT -5. The time now is 08:55 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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