Verify JB4 is working

[fackamato]

Hi all,

I just installed JB4 in stage 1 mode (just connecting the 2 sensors, that's it). How can I verify it's working?

I drove around for 2h with Torque Pro and WOT on multiple gears revving out I never got over 18.3 PSI.

[mike@x-ph.com]

Post a datalog

[fackamato]

Originally Posted by mike@x-ph.com

Post a datalog

Yes Sir, USB cable is currently in shipping!

Just to confirm, by default, the unit operates in stage 1 mode?

And, there are no ground/+12v cables?

Thanks

[mike@x-ph.com]

Originally Posted by fackamato

Yes Sir, USB cable is currently in shipping!

Just to confirm, by default, the unit operates in stage 1 mode?

And, there are no ground/+12v cables?

Thanks

If you connect MAP and TMAP only, it should run as a stage 1 JB

[fackamato]

So, I think I got it sorted. I got the USB cable, connected it, and it said Map 0. First thing I did was upload the newest firmware, then verifying that I could switch between map 0 and 1. I left it at map 1.

When I tried datalogging it didn't log anything, I assume you need an OBD cable for that. My JB4 has no OBD connections.

By the way, the official USB cable shipped has a too big case for the serial port - it won't fit the case. So you have to remove it.

Pictures here:

View post on imgur.com

There is a huge difference in second gear. I tried some 35-100mph runs in 3rd gear a couple of times to see what boost I would see via Torque. The max I saw was 18.4, which is a bit higher than 16.8 before.

Edit, ah, the OBD2 connections are probably the wires that I stowed away. 2 of them, loose from the JB4 harness.

View post on imgur.com

. JB4 x55 rev 3.0

[fackamato]

Here's a quick run. Max boost seen is 23.8. I can't find a grommet in the firewall on this 6MT F80 to run the cable through. Just the hood mechanism and brake hose (and electronics), so I did the test with the cables outside the car.

[Mike@N54Tuning.com]

Originally Posted by fackamato

Here's a quick run. Max boost seen is 23.8. I can't find a grommet in the firewall on this 6MT F80 to run the cable through. Just the hood mechanism and brake hose (and electronics), so I did the test with the cables outside the car.

You open JB4 logs in the JB4 interface for charting. No excel required

Mike

[horsepower_and_hounds]

Map 1 your getting 23.8 boost? And your boosting above target? Is this right? Wow...... I can't get 23 on a good day running Map 6 or 7 with E85...all wires connected

[fackamato]

Originally Posted by ehagerty

Map 1 your getting 23.8 boost? And your boosting above target? Is this right? Wow...... I can't get 23 on a good day running Map 6 or 7 with E85...all wires connected

I'm not sure? Here is the log opened in the application instead of my Excel graph. Shows target is 4 (assume +4 PSI over stock boost) & boost being 23.8 which is the max I saw on that run.

I wonder if the boost is read from the cars sensor then just the integer 4 added? Or is it actually measured (verified) boost pressure?