Updating my JB4 for N55

BMB063 · 05-19-2015, 07:45 PM

Hi,

I've had my JB4 installed for some time now and have been getting a rough idle. I replaced my spark plugs and have only 20k miles. I would like to update the JB4 in hopes that it will help, but want to make sure I update the right way and do the right version.

Which link should follow even though it says for N54?
http://www.n54tech.com/forums/showthread.php?t=17441 - ISO
http://www.n54tech.com/forums/showpo...08&postcount=1 - E Series

I have a 2011 N55 stage 1 JB4 with downpipes.

I tries searching on the forums, but nothing gave me a straight forward answer. Any help would be great!

weehe126 · 05-19-2015, 09:18 PM

Do you have a stage 1 http://burgertuning.com/N55_Jb_BMW_P...nce_Tuner.html or a JB4 http://www.burgertuning.com/N55_Stage2_Jb4.html ?

If you have a JB4 and the USB cable to connect to a laptop, download and install the firmware at the bottom of the first post in the second link you posted (E Series). You have a N55, not N54. The tuning is different between them. Also, I doubt updating the JB4 will help with a rough idle and you have a down pipe, not downpipes.

E90 335xi · 05-20-2015, 02:28 PM

Quote:

Originally Posted by weehe126

Do you have a stage 1 http://burgertuning.com/N55_Jb_BMW_P...nce_Tuner.html or a JB4 http://www.burgertuning.com/N55_Stage2_Jb4.html ?

If you have a JB4 and the USB cable to connect to a laptop, download and install the firmware at the bottom of the first post in the second link you posted (E Series). You have a N55, not N54. The tuning is different between them. Also, I doubt updating the JB4 will help with a rough idle and you have a down pipe, not downpipes.

Yes, what weehe126 said.

If you have the JB Stage 1, then you don't have the JB4, and vice-versa.

I'm not even sure if you can connect a USB cable to the Stage 1 to upgrade the firmware.

You can upgrade from a Stage 1 to a JB4 however:
http://www.burgertuning.com/N55_JB4_upgrades.html

JB4 ISO firmware 5_2 and higher may improve idling for those running the flex fuel wires for E85.

Lastly, perhaps most importantly, your best bet for BMS support whether Stage 1 or JB4 is on their N54tech.com site:
http://www.n54tech.com/forums/forumdisplay.php?f=35

05-19-2015, 07:45 PM	#1
BMB063 Lieutenant 93 Rep 560 Posts Drives: E92 M3 Join Date: Sep 2014 Location: Columbus, OH iTrader: (2)	Updating my JB4 for N55 Hi, I've had my JB4 installed for some time now and have been getting a rough idle. I replaced my spark plugs and have only 20k miles. I would like to update the JB4 in hopes that it will help, but want to make sure I update the right way and do the right version. Which link should follow even though it says for N54? http://www.n54tech.com/forums/showthread.php?t=17441 - ISO http://www.n54tech.com/forums/showpo...08&postcount=1 - E Series I have a 2011 N55 stage 1 JB4 with downpipes. I tries searching on the forums, but nothing gave me a straight forward answer. Any help would be great! __________________ Competition Package \| OEM Exhaust Mod \| Test Pipes \| BPM Stage II Tune \|CF High Kick Spoiler \| CF Splitters \| Gloss Black Grilles YouTube \| INSTAGRAM \| My New Website: Shifted-Perspective.com \| DM for discounts on: LUX ANGEL EYES or BPM TUNES
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05-19-2015, 09:18 PM	#2
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Do you have a stage 1 http://burgertuning.com/N55_Jb_BMW_P...nce_Tuner.html or a JB4 http://www.burgertuning.com/N55_Stage2_Jb4.html ? If you have a JB4 and the USB cable to connect to a laptop, download and install the firmware at the bottom of the first post in the second link you posted (E Series). You have a N55, not N54. The tuning is different between them. Also, I doubt updating the JB4 will help with a rough idle and you have a down pipe, not downpipes.
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