Engine idle speed

When the car was idling I unplug the IAC connector, no change at the rpm. So I guess the IAC is closed. The TPS was reading zero percent. My questions are, what the TPS should read at idle? The throttle body has two screws one on the spring loaded lever where the accelerator cable hooked too. And another one screw in the throttle body I think it restrict the air going in. Because that screw it like plug a bypass if I screw it in and allow air goes more when I do not. So do I need to adjust those screws?

Okay, the first screw is called throttle body plate stop screw. The second is called idle adjustment screw. Forgot to tell you the idle went up after I cleaned the throttle body and for your information. I do not have AC.