Getting complete fuel cut, need help.
 

So I have been reading a lot about the 3k hesitation, and I have gone through and completed a lot of the grounding issues. Still have the same problem.

Check/Fixed: Fuel pump upgrade to 255lph Walbro and completely rewired (problem was there before the new fuel pump), new ground wires ran for the battery ground, boost sensor, and grounding strap for engine to frame. Checked and cleaned ECU ground attached to engine under the coil packs. New fuel filter, spark plugs, and spark plug wires (magnacore).

Partial throttle builds boost up to 4-5psi with no cut. Either half to full throttle or trying to get more boost and I get complete fuel cut. No hesitation just complete cut.

To me this seems like something mechanical for something physically cutting. Which would lead me to believe it is the secondary injectors? Is there any way to check this or should I just break down and get injectors?

I am located in Okinawa, Japan and the car has roughly 150,000 KM for mileage and I have no idea if the injectors have ever been replaced.

Any help would be appreciated. The car has ran good for the past 22 months.