It happens all the time. I get in with nothing on, No lights, radio... I just tuned it up. dist. cap, rotor- plugs, wires, fuel filter, air filter, pcv. But anyway, When i start it up, It hesitates rpms run low then it trys to die. I hit the accelerator to keep it running. It hapens after it is warmed up, Even at a red light. I noticed that it blows very cold, then it seems to just blow cool air.