E90Post
 


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



Reply
 
Thread Tools Search this Thread
      11-09-2012, 10:12 PM   #1
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

boost leak?

Hi All,

how does a boost leak feel?, i am not sure if i have a boost leak or not, would you feel hesitation, jerking?

Thanks
335twins is offline  
0
Reply With Quote
      11-09-2012, 10:13 PM   #2
Fully_Bolted
Banned
 
Drives: E92 335i
Join Date: Sep 2012
Location: USA

Posts: 443
iTrader: (0)

Check engine light and car SLOW.
Fully_Bolted is offline  
0
Reply With Quote
      11-09-2012, 10:17 PM   #3
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

not getting check engine light and the car is ok until a certain speed, example, going around 75mhp, 2k rpm, i get on the throttle a little, the car starts going, but i feel some jerking at times..

Quote:
Originally Posted by Fully_Bolted View Post
Check engine light and car SLOW.
335twins is offline  
0
Reply With Quote
      11-09-2012, 10:20 PM   #4
benzy89
Banned
 
Drives: '08 E90 335i
Join Date: Jan 2012
Location: Northern NJ

Posts: 2,396
iTrader: (3)

Garage List
2008 BMW 335i  [3.75]
Quote:
Originally Posted by 335twins View Post
Hi All,

how does a boost leak feel?, i am not sure if i have a boost leak or not, would you feel hesitation, jerking?

Thanks
Since you're not getting a CEL, can really only do two things:
  1. Scan for Fault Codes
  2. Take some logs & check your boost curve
benzy89 is offline   United_States
0
Reply With Quote
      11-09-2012, 10:22 PM   #5
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

well i dont have anything to scan or log the car
Quote:
Originally Posted by benzy89 View Post
Since you're not getting a CEL, can really only do two things:
  1. Scan for Fault Codes
  2. Take some logs & check your boost curve
335twins is offline  
0
Reply With Quote
      11-10-2012, 12:28 AM   #6
Dave W.
Lieutenant
 
Drives: Porsche 951, 1992 Eagle Talon
Join Date: Apr 2012
Location: SF Bay Area

Posts: 477
iTrader: (0)

Does the jerkiness you get feel like a change in engine power, like it has good power for a second, then power is down for a second?
Dave W. is offline  
0
Reply With Quote
      11-10-2012, 12:32 AM   #7
GAM
Lieutenant
 
GAM's Avatar
 
Drives: 2011 E92 M3
Join Date: Mar 2012
Location: Palm Beach

Posts: 466
iTrader: (1)

Sounds like a pre misfire. Car hesitation under load right? If you keep punching until the computer throws a misfire we can find out where your problem is coming from. Usually plugs, coils or injector.
GAM is offline  
0
Reply With Quote
      11-10-2012, 12:44 AM   #8
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

yes exactly, it feels like the car wants to go and then i feel the jerk, go, jerk go..

Quote:
Originally Posted by Dave W. View Post
Does the jerkiness you get feel like a change in engine power, like it has good power for a second, then power is down for a second?
335twins is offline  
0
Reply With Quote
      11-10-2012, 12:54 AM   #9
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

my fuel injectors, spark plugs were replaced 2k miles ago. It is hesitation, but more like jerking feeling.

Quote:
Originally Posted by Gfabry View Post
Sounds like a pre misfire. Car hesitation under load right? If you keep punching until the computer throws a misfire we can find out where your problem is coming from. Usually plugs, coils or injector.
335twins is offline  
0
Reply With Quote
      11-10-2012, 08:31 AM   #10
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

Any other ideas guys?
__________________
Cobb tuned, custom intakes
335twins is offline  
0
Reply With Quote
      11-10-2012, 09:05 AM   #11
Mike@N54Tuning.com
BimmerPost Supporting Vendor

 
Drives: 07335i
Join Date: Dec 2008
Location: Earth

Posts: 14,630
iTrader: (86)

Scan for codes. Otherwise its just a guessing game. Any independent BMW shop should be able to scan the car for a few bux.

Mike
Mike@N54Tuning.com is offline   Canada
0
Reply With Quote
      11-10-2012, 10:32 AM   #12
neilvosko
Major
 
neilvosko's Avatar
 
Drives: 335i e92 FBO
Join Date: Dec 2011
Location: miami

Posts: 1,398
iTrader: (16)

Slow boost and will sound like turbulent air. I had to add gasket maker to my charge pipe and bob recently, the 15 psi really does a number on em
neilvosko is offline   United_States
0
Reply With Quote
      11-10-2012, 10:32 AM   #13
neilvosko
Major
 
neilvosko's Avatar
 
Drives: 335i e92 FBO
Join Date: Dec 2011
Location: miami

Posts: 1,398
iTrader: (16)

At will also feel super sluggish, like a corolla.
neilvosko is offline   United_States
0
Reply With Quote
      11-10-2012, 10:57 AM   #14
zztwinturbozz
Private
 
zztwinturbozz's Avatar
 
Drives: 335i xdrive
Join Date: Jun 2012
Location: Denver

Posts: 76
iTrader: (1)

Your clutch is going out
zztwinturbozz is offline  
0
Reply With Quote
      11-10-2012, 11:46 AM   #15
benzy89
Banned
 
Drives: '08 E90 335i
Join Date: Jan 2012
Location: Northern NJ

Posts: 2,396
iTrader: (3)

Garage List
2008 BMW 335i  [3.75]
Quote:
Originally Posted by 335twins View Post
well i dont have anything to scan or log the car
AutoZone or find a local who's got the COBB AccessPORT & can scan for fault codes/log some pulls.
benzy89 is offline   United_States
0
Reply With Quote
      11-10-2012, 12:00 PM   #16
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

Quote:
Originally Posted by zztwinturbozz
Your clutch is going out
It's automatic
__________________
Cobb tuned, custom intakes
335twins is offline  
0
Reply With Quote
      11-10-2012, 12:02 PM   #17
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

The car doesn't feel sluggish, it pulls like a freight train but at 80 mph when I am crusing and get on the throttle a bit I feel like the car is jerking, if that's the right way to explain it, it's pulling but with jerking in between like someone would hit me from behind.
__________________
Cobb tuned, custom intakes

Last edited by 335twins; 11-10-2012 at 02:02 PM.
335twins is offline  
0
Reply With Quote
      11-13-2012, 08:38 AM   #18
Fully_Bolted
Banned
 
Drives: E92 335i
Join Date: Sep 2012
Location: USA

Posts: 443
iTrader: (0)

Quote:
Originally Posted by 335twins View Post
The car doesn't feel sluggish, it pulls like a freight train but at 80 mph when I am crusing and get on the throttle a bit I feel like the car is jerking, if that's the right way to explain it, it's pulling but with jerking in between like someone would hit me from behind.
This is all just a guessing game until you can come back with some tangible data, have the car scanned for codes or find a way to get some datalogs.
Fully_Bolted is offline  
0
Reply With Quote
      11-13-2012, 08:45 AM   #19
MSport35TT
Captain
 
Drives: 335i
Join Date: Oct 2012
Location: NJ & MA

Posts: 678
iTrader: (4)

Garage List
2010 BMW 335ix  [0.75]
I am using a Cobb Tuner and I get the same hesitation at higher speeds/gear. It's tuned with LT sport. I'm also curious as to what it could be.
__________________
TiAg N54 xDrive M-Sport 6MT 2010 I:I N54 I:I CPO-2016
335i SOLD

TMPS Sensor 09+ For Sale
x1 Seat Belt For Sale
MSport35TT is offline   United_States
0
Reply With Quote
      11-13-2012, 08:57 AM   #20
nailer335
Captain
 
nailer335's Avatar
 
Drives: alpine '08 e92 335xi
Join Date: Feb 2010
Location: Arizona

Posts: 690
iTrader: (0)

Just come use my BT cable already, you can scan the car and figure out whats going on and know exactly how to take care of it.
nailer335 is offline   United_States
0
Reply With Quote
      11-13-2012, 11:06 AM   #21
sickem
Freude am fahren
 
sickem's Avatar
 
Drives: in the fast lane
Join Date: Mar 2010
Location: People's Republic of New Jersey

Posts: 1,944
iTrader: (4)

Garage List
Yes, codes are your friend.
__________________
Cobb E40 PROtune by Jake@PTF/RR catless DPs/aFe DCI/ETS 5" FMIC/ER CP/Forge DVs/Alpina B3 TCU flash/BMW Perf. Exhaust./BMW Performance Style 313s/M-Tech Rear
sickem is offline  
0
Reply With Quote
      11-13-2012, 11:13 AM   #22
335twins
Lieutenant
 
335twins's Avatar
 
Drives: 2009 335i, 2012 x3 35i
Join Date: Mar 2012
Location: AZ

Posts: 474
iTrader: (1)

Going to scan for codes today, wish me luck. I am still under warranty so i might use the "Useless BMW service" to see if they can figure something out.
335twins is offline  
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 11:52 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