E90Post
 


TNT Racewerks
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Backfiring after JB4 ISO firmware update?



Reply
 
Thread Tools Search this Thread
      12-15-2012, 08:42 PM   #1
1stockbmw
Private
 
Drives: 2011 E90 335i PE
Join Date: Jul 2009
Location: Woodland Hills, CA

Posts: 55
iTrader: (1)

Garage List
Send a message via MSN to 1stockbmw
Backfiring after JB4 ISO firmware update?

Hey guys so I was wondering if my car was supposed to be backfiring from updating to the ISO firmware. I know it is supposed to have the gurgling sound but the backfiring is new. Here is a video for reference. The motor is the N55 and this is already warmed up.

1stockbmw is offline   United_States
0
Reply With Quote
      12-16-2012, 10:29 AM   #2
mashimarho
BMW Genius
 
mashimarho's Avatar
 
Drives: e92 LCI 335i xDrive™
Join Date: Mar 2010
Location: Grand Rapids, michigan

Posts: 8,945
iTrader: (33)

Garage List
Hmm... I can't imagine why. I wonder if mine sounds like this...
I don't have ISO though.
__________________

Volk///ER///BMS///KW///VRSF///ARKYM///DD///CYBA///STOPTECH///BMW Performance ///
My Progress: http://www.e90post.com/forums/showthread.php?t=770326
mashimarho is offline   United_States
0
Reply With Quote
      12-16-2012, 10:33 AM   #3
E90Company
Major General
 
E90Company's Avatar
 
Drives: Car
Join Date: Mar 2012
Location: FL

Posts: 6,141
iTrader: (2)

That sounds badass! Who cares lol
E90Company is offline   No_Country
0
Reply With Quote
      12-16-2012, 02:24 PM   #4
Dark_Knight_335
Came to the N55 Darkside
 
Dark_Knight_335's Avatar
 
Drives: 2011 335 E93 M-Sport
Join Date: May 2010
Location: NY/NJ

Posts: 9,680
iTrader: (26)

My Dinan exhaust does that- pretty badass, and normal- for my exhaust at least.
Dark_Knight_335 is offline   United_States
0
Reply With Quote
      12-16-2012, 02:29 PM   #5
jsmonet
Lieutenant
 
Drives: 2012 135
Join Date: Nov 2011
Location: so cal

Posts: 444
iTrader: (2)

Just FYI, that's afterfire, otherwise known as little pockets of unburnt fuel igniting in the exhaust. Backfiring is a far more serious issue usually requiring, at the least, a new intake manifold after it happens

Overrun/afterfire is no big deal.
__________________
2012 135i. dinan stg3 | ohlins dfv | assorted rice | hardest parker evAr
jsmonet is offline  
0
Reply With Quote
      12-16-2012, 04:31 PM   #6
sA x sKy
Sameet
 
sA x sKy's Avatar
 
Drives: One Slow Matte Black N55
Join Date: Apr 2010
Location: Long Island, New York

Posts: 1,739
iTrader: (2)

Quote:
Originally Posted by jsmonet View Post
Just FYI, that's afterfire, otherwise known as little pockets of unburnt fuel igniting in the exhaust. Backfiring is a far more serious issue usually requiring, at the least, a new intake manifold after it happens

Overrun/afterfire is no big deal.
Your definition of afterfire is backfire...

Backfire happens when you run too rich and unburnt fuel ignites in the exhaust..its perfectly normal and fine if you're catless. Just have to be careful of the O2 sensors.
__________________
| KW V3 | Vanguard V2 Exhaust | JB4 | AR DP | Custom Stainless Steel DO Meth Setup | BMS CP | BMS Intake | M-Sport | ZCP M3 Spoiler | Gunsmoke Euro LCI Tails |


PLASTIDIPPPED Matte Black E92 Photoshoot
sA x sKy is offline   Bangladesh
0
Reply With Quote
      12-16-2012, 04:38 PM   #7
PR3CI5N
need4speed
 
PR3CI5N's Avatar
 
Drives: 2010 E90 M 335i
Join Date: Jun 2010
Location: West Coast

Posts: 1,161
iTrader: (15)

You have your mufflers deleted?
__________________
N54
PR3CI5N is offline   United_States
0
Reply With Quote
      12-16-2012, 05:36 PM   #8
1stockbmw
Private
 
Drives: 2011 E90 335i PE
Join Date: Jul 2009
Location: Woodland Hills, CA

Posts: 55
iTrader: (1)

Garage List
Send a message via MSN to 1stockbmw
Yup mufflers are deleted. I just love the sound haha. Oh and also I still have the stock downpipe so I am not running a catless set up, its just the muffler delete.
1stockbmw is offline   United_States
0
Reply With Quote
      12-16-2012, 06:23 PM   #9
madmanhiker
Lieutenant Colonel
 
madmanhiker's Avatar
 
Drives: '11 E92 335i
Join Date: Jul 2008
Location: Jacksonville, Fl

Posts: 1,549
iTrader: (3)

Garage List
I noticed the same issue - I emailed Terry about it already as well. Let him know, this may be a characteristic of the new firmware in certain configurations. I did NOT backfire nearly as much prior to the ISO, and I know my car inside and out.
__________________
-madmanhiker jax,fl
madmanhiker is offline   United_States
0
Reply With Quote
      12-16-2012, 07:28 PM   #10
SfValley335i
Colonel
 
Drives: Current:135i Sold:335i sedan
Join Date: Mar 2007
Location: City of Angels

Posts: 2,396
iTrader: (8)

Send a message via AIM to SfValley335i
look at this way, now you can shoot fireballs from your muffler
SfValley335i is offline   Afghanistan
0
Reply With Quote
      12-17-2012, 05:36 AM   #11
BMW_Belgier
Lieutenant Colonel
 
BMW_Belgier's Avatar
 
Drives: E92 335xi n55
Join Date: May 2012
Location: Switzerland

Posts: 1,519
iTrader: (0)

Just like the PPK...
__________________
BEFORE: 130i N52 (2006-2011)
NOW: 335xi N55 (2011- )
BMW_Belgier is offline   Switzerland
0
Reply With Quote
      12-29-2012, 09:14 PM   #12
335iBoii
Take Off*
 
Drives: 335i
Join Date: Dec 2011
Location: GTA

Posts: 47
iTrader: (0)

i like it.. lol
__________________
JB4 G5 ISO, AR DP's, ER CP, Synapse BOV, AlpineMSS HID, BMS Oil Catch Can, BMS CDV... WISHLIST--> LSD

Last edited by 335iBoii; 12-30-2012 at 12:48 PM.
335iBoii 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 09:24 PM.




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