We’ll show you how to install a Burger Motorsports JB4 Performance Tuner on your E-Series vehicle fitted with an N55 Engine.
Please note, this tutorial is written for Right Hand Drive (RHD) vehicles. The process for Left Hand Drive (LHD) vehicles is very similar, however the JB4 needs to be mounted on the opposite side.
We’re now ready to connect each of the JB4 connectors.
Plug #1) TMAP Sensor. Rainbow loom.
Plug #2) MAP Sensor. Brown loom.
Plug #3) Optional Fuel Pressure Connector*. Black loom.
Plug #4) Boost Solenoid. Blue loom.
*The Fuel Pressure Connector gives the JB4 a higher range of fuel trim adjustment which is useful for higher power levels and/or E85 fuel mixtures. Not generally required for Map1 or Map2 applications. Stow the connector inside the ECU wiring box if it is not required for your application.
The two JB4 CAN wires need to be connected to the vehicle.
Unwrap the felt which covers these connections. You will find two clear/black caps. These caps will pull off with a small amount of heat from a heat gun.
Once removed, wrap the corresponding JB4 wire around the bare wire bundle, and slide the cap back over the wires. Ensure this connection is secure.
JB4 Brown Wire -> BMW Red bundle
JB4 Green Wire -> BMW Blue bundle
Reinstall the ECU wiring box lid and all cowling accessories. This is a great opportunity to install a pair of Burger Motorsports Cowl Filters!
Finished! We also took this opportunity to install a Burger Motorsports N55 E-Series Intake.
For full details about JB4 tuning and configuration, please see this post on N54Tech.