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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > car feels dead after updating jb4 g5iso



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      08-11-2015, 01:14 PM   #1
GI335I
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Exclamation car feels dead after updating jb4 g5iso

After updating jb4, underboosting and feels sluggish and dead, 30ff code
I think the menu 10 11 and 12 are messed up because they have new defaults after beeing updated.. anyways what is the right way to setup 10 and 12?
After what I read on some threads, stock values should be
10 is 80% or 4k rpm
11 is the same i think at 80%
12 is 32

Atm 10 is 3k, 11 is 4.5k and 12 is 2k rpm
By 32 which rpm should it be?

and is it okay to adjust the duty bias on all rpms to 0?
thanks for the help in advance..

attached: here are the current values of my jb4
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      08-11-2015, 02:08 PM   #2
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      08-11-2015, 11:29 PM   #3
andydna15
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Quote:
Originally Posted by GI335I View Post
After updating jb4, underboosting and feels sluggish and dead, 30ff code
I think the menu 10 11 and 12 are messed up because they have new defaults after beeing updated.. anyways what is the right way to setup 10 and 12?
After what I read on some threads, stock values should be
10 is 80% or 4k rpm
11 is the same i think at 80%
12 is 32

Atm 10 is 3k, 11 is 4.5k and 12 is 2k rpm
By 32 which rpm should it be?

and is it okay to adjust the duty bias on all rpms to 0?
thanks for the help in advance..

attached: here are the current values of my jb4
All Duty Bias needs to be set to 0.

Taken from n54tech
***DO NOT UPLOAD FIRMWARE UNTIL YOU READ THIS *** The latest firmware later REQUIRES JB4 INTERFACE DATED 3/1/15 OR NEWER AND SETTING CHANGES. All Duty Bias (formerly CPS) must be set to 0 or 50 to avoid 30FF under boost codes. 3rd gear boost limiting should also be set to 0 to disable. Failure to do this will result in poor performance.***
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      08-12-2015, 12:28 AM   #4
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Screw reading directions amirite?
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      08-12-2015, 09:53 AM   #5
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And look at your N20 TMAP and 6-Cyl Timing Logging values. Why are they at 15?

If you don't have the N20 TMAP set it to 0 and set your 6-CYl Timing Logging to either 4 or 5 depending on your ECU.
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      08-12-2015, 12:25 PM   #6
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At all duty bias values to 0, change the value accordingly for the N20 sensor.
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