Pull the accelerator pump and look at it. Today's fuels eat parts quickly, especially if left idle for any period of time. Increasing fuel pressure is a bad idea, as all that can do is force the needle off the seat and flood your carb. The job of the fuel pump is simply to keep the bowls full under all load conditions. If you're starving out at WOT that points to one of two things, a weak fuel pump or undersized fuel line. Increasing pressure at the carb is not going to help either condition.