After I start the car and it runs to warm up it'll die. When I restart it the RPM gauge jumps all the way to the red lines and moves up and down as I excelerate, never going down past the half way point. Most of the time the check engine light comes on and stays on. At times the check engine light does not come on. This has started ever since it got cold outside. 32 degrees or below. This is the first year the car has not been in a garage most of the time. First year in Wisconsin. It drives fine, but scares me with the gauge and check light.