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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > questions about JB4 installation/usage
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      02-22-2017, 08:38 PM   #1
obiwanshinobi87
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questions about JB4 installation/usage

Hi, I installed my new JB4 and Bluetooth kit today, and I have some questions concerning its usage.

I followed the installation guide, doing this:

1) Disconnected the battery. Removed the TMAP sensor, plugged the JB4 into it and the JB4 into the engine.

2) Removed MAP sensor, plugged the JB4 into it and the factory harness.

3) Ignored the OBDII and CANbus wires because the Bluetooth makes them redundant...right?

4) Installed the Bluetooth kit into the JB4, plugged the red wire into the JB4's red wire. Reconnected the battery.

Here's my problem. When I connect the app and select Map1, everything is fine, but when I actually run the engine and drive, the logging and dials show no engine activity, even though I'm driving and everything seems to be operating normally. Also, I'm not sure if I feel a difference in the performance, so I'm not entirely sure if the JB4 is actually working or not. Advice?

Here are some logs:

https://drive.google.com/open?id=0B8...3BRRkhGajhWR28
https://drive.google.com/open?id=0B8...UVnZi00UWpfSnc

Thanks!
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      02-23-2017, 02:57 AM   #2
Mike@N54Tuning.com
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OBDII is required.
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      02-23-2017, 10:49 AM   #3
SingleturboVert
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Might want to check this thread, may provide some related insight, though it is for N55.

http://f30.bimmerpost.com/forums/sho....php?t=1197166
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      02-23-2017, 11:48 AM   #4
obiwanshinobi87
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
OBDII is required.
Thanks Mike. So I still need to install the OBDII through the firewall, even though I already have the Bluetooth connected? Doesn't it just allow control of the JB4 through the steering wheel, which the Bluetooth module already doesthrough phone?
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      02-23-2017, 11:50 AM   #5
mbanks21
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Without OBD2 the JB4 will default to map 1 I believe. You need OBD2. The Bluetooth makes the USB or whatever that plug is for the cpu not needed.
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      02-24-2017, 02:34 PM   #6
Mike@N54Tuning.com
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Quote:
Originally Posted by obiwanshinobi87 View Post
Thanks Mike. So I still need to install the OBDII through the firewall, even though I already have the Bluetooth connected? Doesn't it just allow control of the JB4 through the steering wheel, which the Bluetooth module already doesthrough phone?
OBDII gets critical engine data like air/fuel ratio, timing, fuel trims, throttle position, pedal position, gear, oil temp, etc, etc, to the JB4. It's the reason the JB4 is able to provide a much stronger, smoother, and safer tune than any other system out there. The Bluetooth adapter on the other hand gets that same data from the JB4 to your mobile phone.

Without the OBDII attached the JB4 will revert to a map similar to the B58 JB+, fixed 4psi boost across the board.

Mike
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