1995 Honda Civic IDLE PROBLEM

ITS A CARBURETER AND IV HAD IT ADJUSTED BUT THE REV IS AT ABOUT 800 THEN WHEN IV DRIVEN IT FOR ABOUT HALF HOUR IT GOES TO LIKE 950 OR 1000 RPM WOTS AND EVEN IF THE CAR IS WARM AND I TURN IT OFF AN THEN START IT AFTER A WILE THE REV WILL STICK AND 1500RPM AND THEN WHEN I TAP THE PEDAL IT WILL COME DOWN