soo i replaced my throttle body yesterday, put in a used stock one with the sensors it came with. feels like a new car

.....but the idel when i start it up cold gos to like 2500, and slowly drops to like 1500, and when i put it in drive it goes to about 1000, do i have to get my computer reset to fix this or is there something i can adjust to fix it? Any help would be much appricated!!
thanks, chris
2000 z24 Cavalier
It won´t hurt resetting the comp. just with engine off turn key to on, now disconnect neg. from batt. wait 5 mints. turn key to off, now reconnect the neg. to the batt. ...done.
WICKED thanks man hopfully it works!
2000 z24 Cavalier