im trying to hook up my vtec the harness already has the vtec oil pressure switch and the for the solenoid i put the computer in i need but one of my friends told me i need to run a wire to the ecu how do i do this ? what wire ?

 

Not enough info here for anyone to help you.

 

ECU pin A4 needs to go to the VTEC solenoid and pin D6 needs to go to the Pressure switch. Hopefully you know how to identify the pins...