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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 > JB4 Map 2 and 5 only targeting 13-14?



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      10-11-2015, 07:06 PM   #1
BMSE92_Harry
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JB4 Map 2 and 5 only targeting 13-14?

Hi all, I'm N54 E92 FBO with JB4 running the newest firmware.

Car used to target 17 psi and I have no problem hitting target boost. But lately my car is only targeting 13-14 psi on map 2 and map 5 with the same mod.

Does anyone have any idea what it could be?
Also can someone tell me how to post log?
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      10-11-2015, 09:04 PM   #2
theweebabySeamus
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Well, map 2 is a 14.5 psi map...
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      10-11-2015, 09:15 PM   #3
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Quote:
Originally Posted by Harrychiu012 View Post
Hi all, I'm N54 E92 FBO with JB4 running the newest firmware.

Car used to target 17 psi and I have no problem hitting target boost. But lately my car is only targeting 13-14 psi on map 2 and map 5 with the same mod.

Does anyone have any idea what it could be?
Also can someone tell me how to post log?
Open a datazap acct and load up your CSV files there, then post the link.
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      10-11-2015, 09:21 PM   #4
maximum96
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If you have a jb back end flash and menu 4-2 on,u should see 17 psi in map2...no backend flash and menu 4-3 then yes 14.5 psi...of course on latest firmware
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      10-11-2015, 11:20 PM   #5
BMSE92_Harry
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I understand on map 2 it would target 14.5 but on map 5 it used to target 17, I have logs to prove it. But now map 5 feels more like map 1.
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      10-12-2015, 03:11 PM   #6
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Quote:
Originally Posted by Harrychiu012 View Post
I understand on map 2 it would target 14.5 but on map 5 it used to target 17, I have logs to prove it. But now map 5 feels more like map 1.
as mentioned above post a log so we can help
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      10-13-2015, 12:08 PM   #7
Mike@N54Tuning.com
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Quote:
Originally Posted by theweebabySeamus View Post
Well, map 2 is a 14.5 psi map...
+1

Around 15 would be the correct target for map2. Best bet is to catalog with the JB4 software and see what your curves looks like.

Mike
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