Could be the Wal-mart by us getting bad gas from a distributor. My wife’s friend had to have her fuel injectors replaced at a dealership where she bought her car and they told her not to use Wal-marts gas. I don’t buy gas at a no name station for the fact I don’t trust them but it can happen anywhere I guess. I like to use a station that sells a lot of gas. I've had cars run bad from the small stations. Maybe it's my way of thinking but when the car runs rough after filling up when it was ok before, I have to think they may have a little water in the storage tank.

Richard