The Magneti Marelli 6JF ECU is used on all 1.3 Multijet 70HP engines by manufacturers world wide but still today most people don’t know much about it’s maps and the best way to tune this car to keep smoke to a minimum and get a good power increase especially in low rpms.Here I want to share the guide on WinOLS tune Magneti Marelli 6JF ECU map.
This tuning guide is split in two parts, the first describes the maps and the second will show how to correctly tune this ecu.
Preparations:
WinOLS Free Download for Win XP/Win 7 Installation
WinOLS Remap Exhaust Gas Recirculation (EGR) Map in The ECU
Bosch Motronic 1.7 ECU Remap/Flashing Guide (WinOLS)
How to Make Checksums for ECU Files with WinOLS
This map regulates the Exhaust gas recirculation valve.
EGR Switch
This single value is used to deactivate the EGR valve keeping it both closed & removing possible DTC errors. You must set this value to 47506 to turn off the egr control.
Drivers Wish
This map shows the desired torque depending on the RPM and the Throttle position. The output of this map is Torque (Nm). There are always two drivers wish maps.
Start of Injection
This map shows the start of injection depending on the RPM and the requested fuel. The output of this map is degrees rotation.
Injection Duration
This map shows the injectors opening time needed to achieve the amount of fuel requested depending on the rail pressure and the requested fuel. The output of this map is microseconds.
Lambda for High IQ
This map limits the air to fuel ratio needed to achieve optimum combustion depending on RPM and the intake airmass. The output of this map is AFR.
Rail Pressure
This map gives the setpoint for rail pressure depending on RPM and the requested fuel. The output of this map is Bar
Rail Pressure Limiter (Boost)
This map limits the rail pressure depending on RPM and boost pressure. The output of this map is Bar.
Rail Pressure Limiter (Fuel Temp.)
This map limits the rail pressure depending on RPM and fuel temperature. The output of this map is Bar.
Torque Limiter #1
This map limits the torque of the engine based on RPM . The output of this map is Torque in Nm.
Torque Limiters #2 & #3
These maps limit the torque of the engine based on RPM . The output of these maps is Torque in Nm.
Torque Limiters #4, #5, #6 & #7
Maps #4, #6 & #7 limit the torque of the engine based on RPM .
Map #5 limits the torque of the engine based on the gearbox.
The output of these maps is Torque in Nm.
Torque Limiter (H2O Temp.)
This map limits the torque of the engine based on RPM and Coolent Temperature. The output of this map is Torque in Nm.
Torque Limiter (Fuel Temp.)
This map limits the torque of the engine based on fuel temparture. The output of this map is Torque in Nm.
