Engine stalls upon slowing down or at stop

Engine seemed to run a bit hot, never had a light but I did have fluid drainage and the hoses were extremely hot to touch after a short drive. I replaced the thermostat and lower radiator hose and cap, went to drive the car it ran fine until I had to slow down for a red light or traffic then it would die, but would start right back up, I thought the carb was goen bad, fluding out or needed adjusting, but the next day I replaced the radiator cap again this time with a heavy duty one(higher psi) went to drive the car an she ran great never stalled out no drainage noticed, has anyone ever had this issue, or heard of this problem?