Ihave A 93 Sentra. When It Gets To Operating Temp It Stalls Alot. I Changed The O2 Sensor, And No Change. Has This Ever Happened To Anyone? If So What Was The Problem.the Car Has A 1.6 Dohc

How many miles are on the car? Has it had a general tune-up (Cap, rotor, ect)? Does the problem only happen when the car is at operating temp?

How many miles are on the car? Has it had a general tune-up (Cap, rotor, ect)? Does the problem only happen when the car is at operating temp?
The car has 87000 miles, and yes it's been tuned, cap, rotor,etc. Usually when the car is warm. It revs than stalls, or revs then almost stalls than revs. it'll do this at idle. The car drives fine other than that.