E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > boost oscillating



Reply
 
Thread Tools Search this Thread
      09-12-2013, 02:42 PM   #1
007_e350
Lieutenant Colonel
007_e350's Avatar
United_States
99
Rep
1,889
Posts

Drives: 335i 2008 MHD'd / x5d E70
Join Date: May 2013
Location: left lane

iTrader: (3)

boost oscillating

haha its funny, typically oscillates between 80 - 100 mph, between 5 - 10 psi in increments of upto 2 psi depending on pedal... my rear turbo was leaking oil - no smoke yet, is that the cause ?

Last edited by 007_e350; 09-12-2013 at 02:58 PM.
Appreciate 0
      09-12-2013, 04:47 PM   #2
Transport3r
Major
Transport3r's Avatar
27
Rep
1,224
Posts

Drives: 2011 N55 E90
Join Date: Sep 2010
Location: Melbourne, FL

iTrader: (2)

Without knowing more details it's impossible to know.
What tune and other modifications are on the car? Mileage? Male/Female? (JK )
__________________
Josh-

Appreciate 0
      09-12-2013, 11:18 PM   #3
007_e350
Lieutenant Colonel
007_e350's Avatar
United_States
99
Rep
1,889
Posts

Drives: 335i 2008 MHD'd / x5d E70
Join Date: May 2013
Location: left lane

iTrader: (3)

Quote:
Originally Posted by Transport3r View Post
Without knowing more details it's impossible to know.
What tune and other modifications are on the car? Mileage? Male/Female? (JK )
jb4 map5 :: Afe intake :: E85 50% :: i think its a boost leak over 5psi causing oscillation, i'll be inspecting hoses this weekend
Appreciate 0
      09-13-2013, 01:16 AM   #4
BEAR-AvHistory
2018 440M-Sport MPPSK/THP
BEAR-AvHistory's Avatar
181
Rep
2,856
Posts

Drives: 2018 440M-Sport MPPSK/THP
Join Date: Jun 2011
Location: NC - USA

iTrader: (0)

What are you measuring the boost with? log?
__________________
Kevin

2018 440M-Sport MPPSK/THP - 2017 CX-5 - 2016 Genesis R-Spec Coupe - 2013 135is Cab 6MT/JB4 - 2009 V-Star - 2009 Expedition 4X4 - 1998 Ranger 4X4 - 1965 Cobra MK-IV Dyno Tuned 477WHP - First Start. 477 WHP of BURBBLES
Appreciate 0
      09-13-2013, 01:24 AM   #5
AK 335i
Major
AK 335i's Avatar
26
Rep
1,294
Posts

Drives: black 335i E90
Join Date: Sep 2012
Location: boynton beach

iTrader: (0)

x2
Appreciate 0
      09-13-2013, 10:12 AM   #6
007_e350
Lieutenant Colonel
007_e350's Avatar
United_States
99
Rep
1,889
Posts

Drives: 335i 2008 MHD'd / x5d E70
Join Date: May 2013
Location: left lane

iTrader: (3)

hijacked fuel guage, i'll take a video
Appreciate 0
      09-13-2013, 10:44 AM   #7
BEAR-AvHistory
2018 440M-Sport MPPSK/THP
BEAR-AvHistory's Avatar
181
Rep
2,856
Posts

Drives: 2018 440M-Sport MPPSK/THP
Join Date: Jun 2011
Location: NC - USA

iTrader: (0)

Quote:
Originally Posted by 007_e350 View Post
hijacked fuel guage, i'll take a video
Not very accurate. Its a close enough for government measurement. You need to read the logs & see the actual boost numbers.
__________________
Kevin

2018 440M-Sport MPPSK/THP - 2017 CX-5 - 2016 Genesis R-Spec Coupe - 2013 135is Cab 6MT/JB4 - 2009 V-Star - 2009 Expedition 4X4 - 1998 Ranger 4X4 - 1965 Cobra MK-IV Dyno Tuned 477WHP - First Start. 477 WHP of BURBBLES
Appreciate 0
      09-13-2013, 12:29 PM   #8
enrita
Major General
enrita's Avatar
Sweden
109
Rep
7,383
Posts

Drives: 335i - Big turbos
Join Date: Sep 2008
Location: Italian in Sweden

iTrader: (0)

Just log it properly and send it to bms....
Appreciate 0
      09-13-2013, 01:53 PM   #9
007_e350
Lieutenant Colonel
007_e350's Avatar
United_States
99
Rep
1,889
Posts

Drives: 335i 2008 MHD'd / x5d E70
Join Date: May 2013
Location: left lane

iTrader: (3)

what do you guys think about boost leak - I'm prob leaking > 5 psi thats when turbos work harder and it leaks again.. logging doesn't tell a whole lot, you'll see the blue line sinosiding around target boost screw that
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 -4. The time now is 07:03 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, 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