F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Boost loss from 3000-4000 rpm
proTUNING Freaks
Post Reply
 
Thread Tools Search this Thread
      02-15-2019, 08:19 PM   #1
icraiiig
New Member
3
Rep
25
Posts

Drives: 335xi
Join Date: Jan 2019
Location: Vegas

iTrader: (0)

Boost loss from 3000-4000 rpm

I recently went from BM3 stage 1 to stage 2, and the first few pulls went well. But now when in any gear 3 or above and I floor it, pulls hard til about 3k then releases pressure almost as if I had a BOV and let off the gas, then goes up to around 4k and does the same again. Similar to how the car would react with traction control in the rain, except TC is off and the road is dry. I have new plugs and coils that I will be doing this weekend. I tried searching around and found one thread where they said their CAI was getting suctioned closed, I tried to stretch the elbow to no avail. Any ideas?

Two datalogs:
http://www.bootmod3.net/log?id=5c6742a9ae729b7750fa2d61

http://www.bootmod3.net/log?id=5c6742a8ae729b7750fa2d5f
Appreciate 0
      02-16-2019, 02:45 PM   #2
akgambino
Lieutenant
Canada
272
Rep
529
Posts

Drives: 2013 F30 335xi M-Sport (PWG)
Join Date: Mar 2017
Location: Saskatchewan

iTrader: (0)

Quote:
Originally Posted by icraiiig View Post
I recently went from BM3 stage 1 to stage 2, and the first few pulls went well. But now when in any gear 3 or above and I floor it, pulls hard til about 3k then releases pressure almost as if I had a BOV and let off the gas, then goes up to around 4k and does the same again. Similar to how the car would react with traction control in the rain, except TC is off and the road is dry. I have new plugs and coils that I will be doing this weekend. I tried searching around and found one thread where they said their CAI was getting suctioned closed, I tried to stretch the elbow to no avail. Any ideas?

Two datalogs:
http://www.bootmod3.net/log?id=5c6742a9ae729b7750fa2d61

http://www.bootmod3.net/log?id=5c6742a8ae729b7750fa2d5f
Have similar issue, looks like clutch slipping but may also be some sort of load limit table that needs tweaking.

Seems to be an issue exclusive to 6mt stage 2 cars that becoming more common.
__________________
2013 F30 335i xDrive M-Sport 6MT (FBO/BM3 custom tune by HCP, 91 oct, 550i clutch, xDelete)
Appreciate 0
      02-16-2019, 03:46 PM   #3
deviantspeed
poopycat
United_States
266
Rep
791
Posts

Drives: 2017 F31 330ixT
Join Date: Jul 2016
Location: I live in a tent around Seattle

iTrader: (0)

AFR doesn't look right at 100% throttle. Should be near 10.80 or a little richer, but it's showing almost stoich.

Your tuner should have picked up on this immediately. There's also timing pull when this happens. If you went STG2, that usually involves a downpipe, I'd suspect the O2 sensor first, but you never know with these flashy flash deals on the ecu these days.
Appreciate 0
      02-16-2019, 07:51 PM   #4
akgambino
Lieutenant
Canada
272
Rep
529
Posts

Drives: 2013 F30 335xi M-Sport (PWG)
Join Date: Mar 2017
Location: Saskatchewan

iTrader: (0)

Quote:
Originally Posted by deviantspeed View Post
AFR doesn't look right at 100% throttle. Should be near 10.80 or a little richer, but it's showing almost stoich.

Your tuner should have picked up on this immediately. There's also timing pull when this happens. If you went STG2, that usually involves a downpipe, I'd suspect the O2 sensor first, but you never know with these flashy flash deals on the ecu these days.
Nah. 10afr at 3500rpm lol ummm no. This issue isn't fueling related.

The severe timing pull is a result of the issue he is having (ie. some sort of dme load/torque limit that makes the car instantly dump boost or cut throttle OR clutch is slipping which causes the dme to do this).
__________________
2013 F30 335i xDrive M-Sport 6MT (FBO/BM3 custom tune by HCP, 91 oct, 550i clutch, xDelete)
Appreciate 0
      02-16-2019, 10:25 PM   #5
icraiiig
New Member
3
Rep
25
Posts

Drives: 335xi
Join Date: Jan 2019
Location: Vegas

iTrader: (0)

Quote:
Originally Posted by akgambino View Post
Nah. 10afr at 3500rpm lol ummm no. This issue isn't fueling related.

The severe timing pull is a result of the issue he is having (ie. some sort of dme load/torque limit that makes the car instantly dump boost or cut throttle OR clutch is slipping which causes the dme to do this).
Appreciate the feedback, how would I be able to narrow it down?
Appreciate 0
      02-16-2019, 10:42 PM   #6
akgambino
Lieutenant
Canada
272
Rep
529
Posts

Drives: 2013 F30 335xi M-Sport (PWG)
Join Date: Mar 2017
Location: Saskatchewan

iTrader: (0)

Quote:
Originally Posted by icraiiig View Post
Quote:
Originally Posted by akgambino View Post
Nah. 10afr at 3500rpm lol ummm no. This issue isn't fueling related.

The severe timing pull is a result of the issue he is having (ie. some sort of dme load/torque limit that makes the car instantly dump boost or cut throttle OR clutch is slipping which causes the dme to do this).
Appreciate the feedback, how would I be able to narrow it down?
Submit tune support request to protuningfreaks
__________________
2013 F30 335i xDrive M-Sport 6MT (FBO/BM3 custom tune by HCP, 91 oct, 550i clutch, xDelete)
Appreciate 0
      02-17-2019, 02:47 PM   #7
icraiiig
New Member
3
Rep
25
Posts

Drives: 335xi
Join Date: Jan 2019
Location: Vegas

iTrader: (0)

Quote:
Originally Posted by akgambino View Post
Submit tune support request to protuningfreaks
I submitted a ticket, now we wait!
Appreciate 0
      02-17-2019, 03:43 PM   #8
deviantspeed
poopycat
United_States
266
Rep
791
Posts

Drives: 2017 F31 330ixT
Join Date: Jul 2016
Location: I live in a tent around Seattle

iTrader: (0)

Quote:
Originally Posted by akgambino View Post
Nah. 10afr at 3500rpm lol ummm no. This issue isn't fueling related.

The severe timing pull is a result of the issue he is having (ie. some sort of dme load/torque limit that makes the car instantly dump boost or cut throttle OR clutch is slipping which causes the dme to do this).
13-14 AFR at WOT isn't good on any car. Best of luck internets.
Appreciate 0
      03-02-2019, 09:26 PM   #9
akgambino
Lieutenant
Canada
272
Rep
529
Posts

Drives: 2013 F30 335xi M-Sport (PWG)
Join Date: Mar 2017
Location: Saskatchewan

iTrader: (0)

Quote:
Originally Posted by icraiiig View Post
Quote:
Originally Posted by akgambino View Post
Submit tune support request to protuningfreaks
I submitted a ticket, now we wait!
Did u ever get any feedback from ptf on those logs and your issue?
__________________
2013 F30 335i xDrive M-Sport 6MT (FBO/BM3 custom tune by HCP, 91 oct, 550i clutch, xDelete)
Appreciate 0
Post 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 09:15 AM.




f30post
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