My wife has had this happen to her twice in the past two weeks. I haven't experienced it myself so I have trouble describing it well. What happens is while she is driving, typically at 50-80 km/h the engine looses all power. She describes it as "no acceleration". I think that the engine is actually dying all together and she just doesn't realize it. In both cases she has pulled over, put it in park and re-started the engine with no problem. Any ideas what I should be looking for??