Ford Fiesta ST Mk6 ST150 N4JB Ecumaster EMU Black ECU & Plug-and-Play Adaptor Kit

The Ford Fiesta ST Mk6 ST150 N4JB Ecumaster EMU Black ECU & Plug-and-Play Adaptor Kit is a popular standalone ECU upgrade package for modified Fiesta ST150 builds.

This updated V2 adaptor design allows direct installation and integration with the OEM ECU using a link loom for the Ecumaster EMU Black. It is ideal for naturally aspirated builds, turbo conversions, track cars, fast road cars, and motorsport applications where advanced engine management control is required.

The kit gives your Fiesta ST150 access to the powerful features of the Ecumaster EMU Black while retaining a cleaner installation using the vehicle’s existing ECU setup.

Key Features

Designed for Ford Fiesta ST150
Suitable for Ford Fiesta ST Mk6 ST150 models fitted with the N4JB engine.

Ecumaster EMU Black ECU Included
Supplied with the Ecumaster EMU Black standalone ECU as part of the full kit.

V2 Plug-and-Play Adaptor
Updated and improved adaptor design for direct installation and integration with the OEM ECU using a link loom.

Ideal for Modified Fiesta Builds
Suitable for naturally aspirated upgrades, turbo conversions, track cars, and motorsport applications.

Advanced Ecumaster Features
Allows access to features such as traction control, launch control, boost control for turbo conversions, and knock control where correctly configured.

Wideband Lambda Connection
This kit allows a wideband lambda connection through a 6-way DT connector. Please choose the correct lambda link loom based on the lambda sensor you intend to use.

Stock ECU Requirement

We require a Ford Fiesta ST150 stock ECU to build the adaptor loom.

If you supply your own ST150 ECU, this will be used as part of the adaptor loom build.

If an ST150 ECU is not supplied, an additional fee will apply.

Ecumaster EMU Black Features

The Ecumaster EMU Black is a powerful standalone ECU suitable for advanced engine management applications.

Key features include:

• Built-in 4 bar MAP sensor
• Built-in wideband lambda controller
• Bosch LSU 4.2 and LSU 4.9 wideband sensor support
• CAN bus communication
• Drive-by-wire throttle support
• Flex fuel support
• Launch control
• Traction control strategies
• Boost control for turbo conversions
• Knock control
• Closed-loop fuel control
• Closed-loop boost control
• Configurable inputs and outputs
• Motorsport data logging
• Windows-based tuning software

Kit Includes

• Ecumaster EMU Black ECU
• Ford Fiesta ST150 V2 plug-and-play adaptor
• Lambda link loom

Available Options

ST150 ECU Supply

• I will supply my ST150 ECU
• Add ST150 ECU fee

Lambda Options

This kit allows wideband lambda connection through a 6-way DT connector.

Please choose the appropriate lambda link loom from our store based on the specific lambda sensor you intend to use.

Throttle Body Note

There are two types of throttle bodies used on these applications:

• Hall effect throttle body
• Resistive throttle body

The resistive throttle body version will require a simple pin change on the throttle body.

Lead Time Note

Please note there may be a 5–7 working day lead time if the adaptor needs to be built to order. We will confirm availability and build status after purchase where required.

Suitable Applications

• Ford Fiesta ST Mk6 ST150
• N4JB engine
• Naturally aspirated modified builds
• Turbo conversion builds
• Track, fast road, and motorsport applications

Important Notes

• Professional installation and mapping are strongly recommended
• Please confirm your vehicle specification before ordering
• We require a Ford Fiesta ST150 stock ECU to build the adaptor loom
• If a stock ST150 ECU is not supplied, an additional fee will apply
• Lambda sensor and lambda link loom selection should match the sensor you intend to use
• Resistive throttle body applications require a simple pin change
• Final calibration is required before full use
• Some features depend on wiring, sensors, and ECU configuration

Motorsport Use Notice

This product is intended for motorsport, competition, and off-road use where permitted. Please ensure the product is suitable for your intended application and complies with any relevant rules, regulations, or emissions requirements before use.