E90Post
 


TireRack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Hesitation/power surging & Spark plug reside - Help anyone?



Reply
 
Thread Tools Search this Thread
      02-22-2013, 12:51 PM   #1
335MHI
Active Werkes
0
Rep
6
Posts

 
Drives: 2008 335 Sedan 6MT
Join Date: Aug 2012
Location: Orlando

iTrader: (0)

Exclamation Hesitation/power surging & Spark plug reside - Help anyone?

Car hesitates/surges under medium ~ wide open acceleration, multiple attemps to fix have failed.

2008 335i sedan

Car ran perfect post: Active Autowerke Software and Race FMIC, Intake, downpipes, N55 coil packs, OEM replacement spark plugs, walnut blast @ dealership, new turbos @ dealership. (Fuel pump and injectors are the latest rev as well)

A few weeks after the new turbo install, a heavy hesitation / power surge developed. I could feel it and hear the boost pressure wavering. I found a boost leak on one of the intercooler 90 degree hose clamp locations and fixed it. It felt a little better but not much. I changed the diverter valves to Turbo Smart dual ports, and this seemed to minimize boost deviation, but the hesitation/surging issue remains. I pulled the spark plugs and noticed black residue in the threads and under the plugs. Picture attached.

Any help or suggestions are appreciated.
Appreciate 0
      02-22-2013, 01:05 PM   #2
enrita
Major General
enrita's Avatar
Sweden
94
Rep
7,331
Posts

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

iTrader: (0)

no picture. N55 coilpacks???
maybe its running too rich.
Codes?
__________________
07 335i AT - TD St.2 Turbos - COBB (Custom Cobb mapping by http://www.protuningfreaks.com/) - JB4G5 ISO - Okada Coils - NGK 5992 Plugs - E85 Walbro - Injen Intake - Helix IC - Snow Stg. 3 - Stett CP - AR DPs - midpipes 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - Level 10 AT upgrade - Alpina AT Flash
Appreciate 0
      02-22-2013, 03:03 PM   #3
335gtl
New Member
0
Rep
21
Posts

 
Drives: 335xi
Join Date: Dec 2011
Location: montreal

iTrader: (0)

Hi! I had the same issue... Dealer fixed it by re-encoding the car modules and cat module after checking if DME software was the most recent. Never understood what they really did but apparently its common fix according to the BMW ing. when BMW can't find any mecanical issue.
Appreciate 0
      02-22-2013, 04:25 PM   #4
335MHI
Active Werkes
0
Rep
6
Posts

 
Drives: 2008 335 Sedan 6MT
Join Date: Aug 2012
Location: Orlando

iTrader: (0)

Yea the N55 packs are more robust (or so I was told). I was blowing coil packs frequently right after getting software, havent had an issue since I changed.

Not throwing any codes...

Pic Attached this time.
Attached Images
 
Appreciate 0
      02-22-2013, 06:47 PM   #5
enrita
Major General
enrita's Avatar
Sweden
94
Rep
7,331
Posts

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

iTrader: (0)

sorry but i havent heard of anybody having issues with stock coil packs even on very high power applications so you better go back to the OEM ones since your issue might be related to something NOBODY is using and maybe as well the tune you are running....
__________________
07 335i AT - TD St.2 Turbos - COBB (Custom Cobb mapping by http://www.protuningfreaks.com/) - JB4G5 ISO - Okada Coils - NGK 5992 Plugs - E85 Walbro - Injen Intake - Helix IC - Snow Stg. 3 - Stett CP - AR DPs - midpipes 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - Level 10 AT upgrade - Alpina AT Flash
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
Forum Jump


All times are GMT -5. The time now is 03:46 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