ItsNiceToBurnRice

My idle is all fucked up. Not one single screw adjustment changes it. When you start it the idle will jump to 3K for a couple seconds then drop down and die. I have to keep it alive until it gets warmed up, and then itll bounce around from 750 down to like 200, and most of the time die right out. And while my car is warmin up for about the first 5 minutes, my car will smoke a little, and anotherthing is my car has been running hot lately, not overheating but pretty damn close, right on the edge of the safe zone. Could my thermostat be the heatin prob, and is my thermowax screwin my idle?