Unusual problem with my car
So my altima has a bizarre problem apparently to even some mechanics I know. When I drive, later after a while, it would run on high rpm so I make it stop by turning my car off then turn it back on and its running fine again and will last 15 mins to an hour. It's like running on high gear and won't shift. (Automatic too). Please help? Engine light won't turn on and pretty sure its not the spark plugs because it isn't hesitating.