I took it as you hit 10psi and the car started to cough and splutter.
Might of just been the AFM plug, check your spark plugs and see how it is running.
Fuel pressure doesn't stop fuel cut, the ecu detects engine boost/air intake levels (to be honest, I don't know if the n/a ecu is capable of this) and stops the injectors firing.
Brad (beerhead) is probably the wisest S series member on here so he could explain it better.