xb12r cuts out above 1/4 throttle

[quagster]

I have an 04 xb12r that idles nice, and takes fuel fine until above 1/4 throttle. Seems throttle dependent, as I can let it rev pretty well by turning the throttle slowly. I Did the Ecm reset twice, and the tps seems to follow the throttle opening fine. replaced the fuel sock, and filter, and the pump sounds good. With ecm spy (mono) running, I see the o2 sensor go down to single digits when snapping the throttle open, but as soon as I let off it resumes running clean. No rich ,or lean condition. It just simply stops running when opening past the 1/4 throttle point, then resumes running fine when I let off just like a light switch. I Will check fuel pressure, and for spark at throttle opening next. I have heard that the ignition pickup can cause this issue. Does it act that that dramatic, or spit and sputter when that unit goes bad?