Avenger 1996 TURN OFF WHILE iM DRIVING

I bought a dodge Avenger 1996, has 140,000milles and since I bought Im having troubles with it, when I be in a corner or stoplight the car turn off, iinnmediatly I have to turn on again and do it, but while Im driving it makes the same thing, doesnt matter if the car is stop or running, just turn off by it self.
The check Engine is always light. Many persons try to fix it but they coudlnt
I hope someone help me
I changed wires, distributor, I checked the injectors and nothing

Thanks so much