https://docs.emtronaustralia.com.au/engine-management/vehicle-specific/toyota-gt86-brz/index.htmlGT86/BRZ/FR-S Plug-in ECU User Manual 1.0 Introduction The Toyota/Subaru GT86/BRZ/FR-S features a flat-four configuration engine that employs an interesting combination of four (4) direct injectors and four (4) port injectors for fuel. The ECU must be able to control both types of injector along with accurately controlling the GDI pump pressure to a target. GDI pressures operate significantly higher than a conventional port injection system.Hugoen-us