it shoudl be 780ish, 1100 is high if its warm. either you have a leak or your iac is messed up.
yes there is a way to adjust the idel, there is an idel screw on the TB it adjust the throtle plate and lets you open or close it more when its shut. if its stock i wouldent touch that screw.. its not your problem. and the valve that controls your idel is the IAC (exsample: its what makes your car idel high when its cold, cant be adjusted)
check your vac lines make sure you dident blow anything off.