![]() |
JB4 2 Step Issues
Hello! I have done a ton of searching about this topic, read all the official threads, and I still have questions so here we are.
With all the changes that have happened with jb4 firmware updates, and install guidance for the 2 step relay there really seems to be a gap in current documentation on how to set this up. Even the manual in N54tech.com shows an outdated version of the relay. With that being said, I am 99% certain I have the relay installed properly, but it is not working as expected. Car: BMW 135i 2008 N54 Mods: Pure stage 2 turbos VRSF Inlets BMS DCI VRSF ********* without CC Berk Street catback Jb4 G5 + Jb4 mobile. Latest firmware installed BMS Backend flash , pump file Fuel it stage 2 LPFP Forge diverter valves BMS Catch can Jb4 2 step relay I just installed the Jb4 2 Step relay (without antilag). The 2 step seems to work at the designated rpm on jb4 setting 8, however I am not seeing any flames, and it is kind of intermittent and inconsistent with where the rpm limits. What is of most concern, is that no matter where I set the 2 Step RPM, the engine will cut out completely under full throttle at about 4,000 RPM almost as if NLS is kicking in, but I don't have the clutch depressed. Foot completely off the clutch pedal. Any idea what the reason for the power cut might be? Some questions I have: 1 Are there any particular default settings I need to turn on in Jb4 mobile for 2 step/NLS to work properly, other than speedo setting 8 RPM setting? 2. Do I need the provided green clutch wire installed? One was included with the kit so I installed it, well now I am reading on the product page "Note that we've modified the JB4 firmware recently so that the clutch wire is no longer required simplifying the installation." I am using latest firmware, so do I need to remove this wire? Can having it installed now create an issue? |
All times are GMT -7. The time now is 05:00 AM. |
Copyright © 2007 - 2020, N54tech.com