340 Idles at 3200 RPM!

So I currently have the pump arm in the middle hole for the accelerator pump. I disconnected the throttle cable and started it up. It still idles at about 3000 RPM. I try to set the choke using the fast idle linkage adjustment procedure in the manual, but once i bump the throttle to test that it goes back to idle, the adjustment I just did does nothing. I'm not quite sure that I'm even doing it right. Like I said earlier, my carb knowledge is next to none. The choke plate on top of the carb just falls open once I give it throttle and it just idles high. So I'm at a loss.