car shuts off wile driving sometimes. put it in n. and it starts back up.

There many possible causes for engine stalling, most of then are electrical. Is the check engine/service engine soon light come on? Have you had computer scanned for any current or history fault codes?

Usually a situation like this needs to be duplicated by the shop. A shop will need to know some specifics so they can duplicate the issue and get down to the root cause. Be prepared to tell a shop when this occurs most i.e. only when hot, after coming out from the store and the car has sat for an hour (known as a hot soak), when I approach the first stop sign after starting the car first thing in the morning, only on a half a tank, etc. Finally, a well equipped shop will be able to test certain components to find the issue you are having. I hope this helps.

I had the same problem, turned out to be the "crankshaft position sensor"was going out and needed replacement!