The engine quits while idling and driving. I was driving when it quit and came to an intersection and had to restart about 3 times before I could keep it running long enough to put in gear and drive. Drove the rest of the way home with no problems. It will sometimes quit after first starting and idling for a couple of minutes. This car was to a dealer for this problem and they could not figure it out, but there is still a problem. Any ideas.