" The optional boost controller kit for the Power FC consists of the pressor sensor, pressure sensor harness and solenoid. The solenoid should be plumbed between your manifold and the wastegate actuator (internal wastegate setup). For external wastegate setup it should be plumbed between the manifold and your external wastegate pressure line. The pressure sensor should be plumbed in parrallel with the factory MAP sensor which is used by your standar boost guage.
The solenoid has two labels on it, you should match them accordingly
COM line should goto wastegate actuator
NO line should goto intercooler piping
It can be T'eed into the plumbing with its included T piece fitting.
Boost Controller Kit Type #1
3 wire plug, Solenoid runs to stock boost control loom on stock ECU wiring loom.
3 wires in Apexi loom are for Map sensor - Signal, Ground and Power
Boost Controller Kit Type #2
5 wire plug, Solenoid runs to map sensor harness which runs to Boost Controller port on PowerFC
3 wires are for Map sensor - Signal, Ground and Power. 2 Wires are for Solenoid Power and Ground
Skyline RB25DET PowerFC and GTR RB26 Uses Type #1
The pressure sensor has the main wiring harness directly attached to itself, one end plugs into the 5 pin port on the PowerFC. The solenoid piggybacks off the Pressure Sensor wiring harness which leads to the PowerFC connector port. The wiring is shown below. ""