Diagram of components for the Hydraulic Electronic Unit Injector(HEUI) fuel system
(1) Unit injector hydraulic pump
(2) Oil filter
(3) Oil cooler
(4) Engine oil pump
(5) HEUI Injectors
(6) Injection Actuation Pressure Control Valve (IAPCV)
(7) Injection Actuation Pressure (IAP) sensor
(8) High pressure oil
(9) Fuel supply rail
(10) Fuel transfer pump
(11) Fuel filter
(12) Fuel tank
(13) Fuel pressure regulator
(14) Back of cam gear
(15) Speed/timing sensors
(16) Fuel/water separator
(17) Electronic Control Module (ECM)
(18) Inlet air pressure sensor
(19) Batteries
(20) Coolant temperature sensor
(21) Inlet air temperature sensor
(22) Oil temperature sensor
(23) Atmospheric pressure sensor
(24) Fuel pressure sensor
(25) Data link (26) Oil pressure sensor