If you haven't been already, newtis has really helped me out a lot, or any time you have access to the wiring diagram stuff in ISTA. Also, that solenoid is activated with a PWM signal. it gets a constant 12v and a PWM. The PWM is actually better used for activating a secondary LPFP. The constant 12v, just use it to power the solenoid and a wireless relay which activates the solenoid.