For ECU remapping Blackburn - get the best performance from your vehicle with a quick and convenient service at the best rates from MAP 12 mobile ECU custom vehicle remapping based in Blackburn, Lancashire, UK. Also known as chip tuning or ECU tuning, ECU (Engine Control Unit) remapping is the fine-tuning of the maps within your car's control unit that command engine performance such as ignition timing, fuel and air mixture and turbo initiation.