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Car: BMW 335xi E90
Exclamation E90 335xi fuel trims and behavior problems - 02-28-2017, 11:06 PM

Hello everyone,

First off, thank you in advance to all who take the time to read on and reply

The car:
335xi 2008 sedan (E90) automatic
Running PetroCanada 94 octane

The mods:
JB4 G5 (obviously)
DCI
******* **
2nd *** delete
Charge pipe with Tial BOV
Alpina flash

Problem:
when driving (normal driving) the trims are all over the place (from close to minimum to almost max) and the car is somewhat sluggish and hesitates when accelerating. When putting the foot to the floor, the car first hesitates, then acts like a rocket (this is most noticed during low RPMs).

Problem persists with or without traction control and DSC, so it's not tires slipping...

Did some little pulls but can't do a proper pull from low to high RPM on 3rd gear because I don't have any places to do that safely (winter, race tracks closed and police everywhere). I have changed the sparkplugs about 6000km ago, changed the air mass sensor in the charge pipe (dead and gone, replaced with new one), cleaned my DCIs

Fuel trims really bother me to be all over the place like that but I have some suspicions on PWM, FF, timing and maybe boost.

I have included a couple logs for your enjoyment

Would like to know if I can do anything to solve this or make it less of a sh!t to drive...

Thank you
Attached Files
File Type: csv 2017-02-10 00_54_55 (M22-ERM).csv (14.7 KB, 37 views)
File Type: csv 2017-02-28 13_45_30 (M22-ERM).csv (11.2 KB, 34 views)
File Type: csv 2017-02-28 13_46_15 (M22-ERM).csv (13.4 KB, 30 views)


BMW 550 M-Sport xDrive 2011
JB4 with OBDII connector
Custom exhaust with 3" quad tips and custom D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag detection
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Car: BMW 335xi E90
Default 03-04-2017, 11:12 AM

Sooo, nobody wants to take a look?

Terry? Anyone?


BMW 550 M-Sport xDrive 2011
JB4 with OBDII connector
Custom exhaust with 3" quad tips and custom D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag detection
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Default 03-04-2017, 01:14 PM

Will need to see better logs but I'd recommend setting menus 11 and 12 to the default settings and see how that does first.



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Default 03-04-2017, 01:38 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Will need to see better logs but I'd recommend setting menus 11 and 12 to the default settings and see how that does first.
What kind of logs you need? I can't really go 150kph without risk...

What are the default settings for 11 and 12?


BMW 550 M-Sport xDrive 2011
JB4 with OBDII connector
Custom exhaust with 3" quad tips and custom D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag detection
Reply With Quote
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Default 03-06-2017, 09:54 PM

The default settings can be found in the user adjustment tab setup example.

http://www.n54tech.com/forums/showthread.php?t=10605



Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
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Default 03-08-2017, 10:02 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
The default settings can be found in the user adjustment tab setup example.

http://www.n54tech.com/forums/showthread.php?t=10605
I see menu 12 has a default setting but menu 11 doesn't...

So it's like playing darts in the dark


BMW 550 M-Sport xDrive 2011
JB4 with OBDII connector
Custom exhaust with 3" quad tips and custom D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag detection
Reply With Quote
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Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Posts: 18,440
Join Date: Oct 2012
Car: 135i
Default 03-09-2017, 10:17 PM






Click on our banner to visit our website!
Video of our Stage 2 LPFP upgrade installation.

BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways.
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Default 03-11-2017, 09:02 AM

Ahah, it's been years since I opened the PC app... only been using the mobile one for so long since it's more convenient and didn't remember those default to be there!

Will check this out soon and see if it helps


BMW 550 M-Sport xDrive 2011
JB4 with OBDII connector
Custom exhaust with 3" quad tips and custom D.P.s
ESR RF2 19" wheels
Front: Michelin Pilot Sport 4S 235/40R19
Front: Michelin Pilot Sport 4S 275/35R19
GPS location alarm system with Tag detection
Reply With Quote
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