hesitation at 2000, 2500, 3000 rpm

[gpeele]

i have a rps13 with bolt ons and a pfc djetro. except for running rich the car was doing ok for a month after the swap. well today i reset my pfc after installing the boost controller for it. i will rev till 2000 rpm and the engine cuts out, sometimes it will be at 2500 and once it happened at 3000. checked the voltages and my o2 sensor voltage keeps oscilating with rpms at idle, going from 0 to .7. i cut off the closed loop option and it stays at around .6 to .7 volts and idle smooths out pretty steady. the engine never osillated this bad before i installed the boost controler.

anyone know what going on, how it can be corrected? if you need more info let me know and ill try my best to answer.

oh yeah it acts like a fuel cut at light throttle but when pushed the engine will rev past those rpms.