Maps and Remapping
An ECU has a piece of software (or program) loaded onto it, which controls the hardware components of an engine. This program is often referred to as a map. However, a map file extracted from an ECU will actually contain several maps. For example, a Boost Map, Fuel Pressure Map and an Injection Quantity Map. By extracting the map data from the ECU, the individual maps can be modified and reloaded to the ECU. If these maps are recalibrated correctly, the performance, drivability and efficiency of an engine can be improved. This process is called remapping.