Fuel Pressure - spill valve not opening

[jcolton]

Hey all, I'm at a bit of a loss here and I've been trying to fix this damn thing for WAAAYYY too long.

Short of it: spill valve does not open for fuel to enter HPFP.

Long bit:
Getting on the freeway nice and slow (had lots of coffee in there) and poof no power...made it home somehow and started tearing into things...

This thing has had corksport HPFP internals since I bought it, they are good, verified with corksport.

Brand New pressure relief valve, old one seemed okay but figured screw it and bought a new one.

Brand new fuel injector seals and cleaned the injectors.

Just installed a brand New ITFP, it's working like a champ.

When I turn the key to aux power, I see 60-70psi (ITFP)...turn key over, idles shittily for approx 3 seconds then dies. Pressure never goes over 60-70.

Accessport reads HPFP psi just fine but reports HPFP Sens. Voltage as 0V

HPFP spill valve solenoid does not seem to be letting fuel into the pump....if I manually give the solenoid 12v, poof, fuel pressure numbers are perfect(ish) I'm seeing approximately the same pressure as the PCM is calling for. Volt meter on the wires confirms that there is indeed 12v from the PCM to the spill valve, but as soon as I plug them into the spill valve, voltage disappears and I never see it again even when the engine turns over and half idles. One last note, when I turn the key to aux power the ECU ticks/clicks continuously (half second second intervals) sounds like a relay.

Is the ECU messed up or what the hell am I missing? Bad ground? I know PCM opens the spill valve based on fuel pressure so maybe it has to do with the HPFP Sens. voltage reporting 0? Ive tried throwing some extra wire from the neg terminal on the battery to the chassis and to the ground plate thing close to the HPFP as I know that's an import ground location for fuel system. I'm stumped....any help would be greatly appreciated!