I have noticed in the last two weeks that when I am driving and I have to stop at a light or something, my car starts idling really low. It is kind of a rough idle and feels like it is going to die. It has doed once. When I am driving it is just fine. I tried putting in some octain boost last time I filled up and this time I am going to try fuel injector cleaner. Any ideas? Is this a fuel related issue or maybe an idling problem?