Jb4 confusion

Godzilla8japan · 12-26-2020, 10:24 PM

Hey fellas. So I just tuned my n54 2008 335i with a jb4. It was used, so not particularly sure of what the model is. Anyhoo, the tune works, it’s way more powerful and the buttons on the steering wheel work. Somewhat. It only goes up to the fifth setting on the volume side. The map setting works, the boost on gas works. I tried the shift light setting, and I was able to adjust the Rpm. However I could not go higher than the fifth setting, and I was wondering if there is a common reason for this. Hopefully someone has some experience with this issue, or can point me to a link for a fix. I could not find a result in a search. At least that was related to this issue. Thanks.

opjose · 12-27-2020, 01:08 PM

5th setting?

Volume side?

Huh?

Fuel-It! · 12-27-2020, 02:40 PM

Check the FAQ: https://www.n54tech.com/forums/showthread.php?t=10605

Godzilla8japan · 12-28-2020, 09:46 AM

I read the faq. According to it the volume side should have 15 options. I can only go up to 5. The tune is working and the options I can access appear to work, after 50 mph on speedo it just increases the volume. Anyone ever heard of that?

ragingpanda · 12-28-2020, 09:52 AM

Sell it and get mhd.

SixSix · 12-28-2020, 10:00 AM

I have never encountered this issue and I've tuned a few buddies N54's both with JB4 or MHD (or both). ragingpanda has a point with selling it and getting MHD to be completely honest. MHD is much more user friendly although you can't map on the fly as quickly as a JB4, map writes are still very quick. I personally run MHD on my car and have no complaints, just get a good quality KDCAN INPA cable like the Bimmergeeks cable and you'll be set.

opjose · 12-28-2020, 11:52 AM

Quote:

Originally Posted by Godzilla8japan

I read the faq. According to it the volume side should have 15 options. I can only go up to 5. The tune is working and the options I can access appear to work, after 50 mph on speedo it just increases the volume. Anyone ever heard of that?

You may have older firmware installed on the JB4.

Pinscher · 12-28-2020, 02:08 PM

N54tech.com is jb4 forums. Best to ask there. You can take a picture of the board inside the plastic box and they will be able to tell you what version you have.

In the end, good luck getting actual help on n54tech, they are elietists, and love showing it or simply never responding to legitimate questions.

opjose · 12-28-2020, 04:46 PM

Also if you have older firmware, DO NOT upgrade it!

There is an important "feature" (cough o2 error suppression cough) that was removed in the ISO firmware revisions.

12-26-2020, 10:24 PM	#1
Godzilla8japan New Member 0 Rep 11 Posts Drives: 2008 335i Join Date: Mar 2020 Location: Az iTrader: (1)	Jb4 confusion Hey fellas. So I just tuned my n54 2008 335i with a jb4. It was used, so not particularly sure of what the model is. Anyhoo, the tune works, it’s way more powerful and the buttons on the steering wheel work. Somewhat. It only goes up to the fifth setting on the volume side. The map setting works, the boost on gas works. I tried the shift light setting, and I was able to adjust the Rpm. However I could not go higher than the fifth setting, and I was wondering if there is a common reason for this. Hopefully someone has some experience with this issue, or can point me to a link for a fix. I could not find a result in a search. At least that was related to this issue. Thanks.
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12-27-2020, 01:08 PM	#2
opjose Major 242 Rep 1,354 Posts Drives: 335xi Join Date: May 2016 Location: Md iTrader: (0)	5th setting? Volume side? Huh?
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12-27-2020, 02:40 PM	#3
Fuel-It! Banned 550 Rep 949 Posts Drives: M4, M5, M2C, X4M, 440i, etc... Join Date: Mar 2019 Location: Phoenix AZ iTrader: (0)	Check the FAQ: https://www.n54tech.com/forums/showthread.php?t=10605
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12-28-2020, 09:46 AM	#4
Godzilla8japan New Member 0 Rep 11 Posts Drives: 2008 335i Join Date: Mar 2020 Location: Az iTrader: (1)	I read the faq. According to it the volume side should have 15 options. I can only go up to 5. The tune is working and the options I can access appear to work, after 50 mph on speedo it just increases the volume. Anyone ever heard of that?
	Appreciate 0 Quote

12-28-2020, 09:52 AM	#5
ragingpanda Banned 321 Rep 751 Posts Drives: 135i Join Date: May 2012 Location: Florida iTrader: (0)	Sell it and get mhd.
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12-28-2020, 10:00 AM	#6
SixSix Private 19 Rep 91 Posts Drives: (2007 BMW 335i E92) Join Date: Oct 2019 Location: Toronto, ON iTrader: (0) Garage List 2002 BMW 325xi [0.00] 2007 BMW 335i [0.00]	I have never encountered this issue and I've tuned a few buddies N54's both with JB4 or MHD (or both). ragingpanda has a point with selling it and getting MHD to be completely honest. MHD is much more user friendly although you can't map on the fly as quickly as a JB4, map writes are still very quick. I personally run MHD on my car and have no complaints, just get a good quality KDCAN INPA cable like the Bimmergeeks cable and you'll be set.
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12-28-2020, 02:08 PM	#8
Pinscher Lieutenant 113 Rep 513 Posts Drives: 2008 335i Join Date: Jan 2018 Location: Vancouver iTrader: (0) Garage List 2008 335i - Stock [0.00] 2007 BMW 328 - 330 ... [0.00]	N54tech.com is jb4 forums. Best to ask there. You can take a picture of the board inside the plastic box and they will be able to tell you what version you have. In the end, good luck getting actual help on n54tech, they are elietists, and love showing it or simply never responding to legitimate questions.
	Appreciate 0 Quote

12-28-2020, 04:46 PM	#9
opjose Major 242 Rep 1,354 Posts Drives: 335xi Join Date: May 2016 Location: Md iTrader: (0)	Also if you have older firmware, DO NOT upgrade it! There is an important "feature" (cough o2 error suppression cough) that was removed in the ISO firmware revisions.
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