bettyboo

Hello everybody. I'm new here so please forgive me if I do or say something wrong. I have a 96 Mustang GT all stock. In the last 2 months I have changed coils plugs and wires throttle position sensor IAC valve a new cam sensor and a crank sensor and a new fuel pump and filter. I am getting a random misfire and I do not know what to do next to be honest. They car idles rough and accelerates like it's running on one cylinder but when you get to your desired speed and let off the fuel to maintain it runs perfect. But the minute you touch the gas to speed up no matter if it's just a little or wide open it starts missing again until you plain back out. Please help if possible any advice would be greatly appreciated