If it was ignition cutting out, it would just die quick. If the engine has injectors, it's possible the power to them is cutting off.
I have Nissan Pulsar CJ2 car and while driving the car the engine stops suddenly. after that when I start car it starts and able to go some distance and shutdown automatically again. sometimes, when i stay in the traffic the engine is vibrating before stop the car and when I'm driving non traffic area the car stop suddenly without any notification. Sometimes I can drive 50-60km and sometime the car stops in very low distance. the check engine light is not indicate and I scanned the car and not received any error code. I changed the Fuel pump and fuel filter of this car. but the problem is not resolved yet. .