An Engine Management Unit is the central microprocessor that dictates how an internal combustion engine runs. It takes inputs from various sensors to adjust fuel delivery, ignition timing, and idle speed in real time. While functionally identical to an ECU or ECM, this specific term is often favored in aftermarket tuning and European contexts.
Heard on the job
We flashed a new map onto the EMU to handle the bigger injectors and higher boost pressure.
Also heard as
- engine management unit
Do not mix it up with
- ECU: ECU can refer to any electronic control unit in the car, while EMU specifically manages the engine.