Intermittently, when leaving from a stop the car will have just enough power to pull forward about a car length before losing all drive power. The engine revs, but behaves as if it were in neutral. This happened a couple times when making a left turn from a stop sign leaving the car in cross traffic, powerless, with cars coming from the drivers side for a second or two before it had power again. It seems to happen in hot weather. It is intermittent. The dealership could not reproduce the problem. There were no warning lamps. I could make the vehicle available for inspection upon request. The first appearance was last summer. It did not do it over the winter. It happened again yesterday. When it happens it tends to happen for a few minutes before driving normally again. It may happen at start up or after the car has been driven for some time.