I recently did some EHA valve adjustments (swapping units, turning adjustments), and i've eliminated the problem of running too lean. Have i introduced the problem of running too rich now?

My car goes pretty quick now when I am not on WOT, but when I go WOT, the car feels slow. I let off a tiny bit and the car accelerates harder. what exactly happens when I go to WOT? is the EHA valve doing its job there or what?