i have Mazda6 2008. while i was at a red light on my way home, my car started to hesitate while i was sitting at the red light as if it wanted to shut off. while i was driving it was fine. but it did that and had a shake to it like it was hesitating. when i got home i shut my car off, when i tried to restart it i had to push the gas for it to start back up., could be i used gas from a station i have never used before? or is it my exhaust system because i believe i have a little hole in it.
