s2000Junky

Sounds good, also if its like the 00-05 models in how fuel is enriched via open/closed loop of the ecu, your WOT would be running rich because you upped the fuel pressure. In WOT/above 50% throttle or so the ecu is in open loop, so now that the car is operating with proper fuel in closed loop/under 50% throttle you now need a retune for open loop/WOT. Don't assume you have a sensor problem yet. Your WOT/open loop was tuned to 40psi, you have sinced doubled the fuel pressure, you should be running very rich there. But again, that's on the premise that the DBW ecu operates in a similar way tot he 00-05. I'm not a DBW guy. But know enough to give educated guess/direction.