My car has a problem starting. It will start and cut off, Sometime it will start right up, but after driving for a while, when I turn it off and try to start it, it will start and turn off. If I'm driving under 35, it may turn off. Sometimes at high speeds it becomes jerky. It's getting gas cause I can smell it. Sometimes it will start in neutral with no problem. Has anyone experience this and what is the solution?