Originally Posted by Stogey
Maybe a silly question, but did you reseat the gas cap properly ? I 've read somewhere a loose gas cap or defective gas cap will cause a sputter and rough idle.
Nah...Bogus. A loose or missing cap will bring on the check engine light, but it will and can not have any affect on the drive ability of the car. The small amount of pressure in the tank is only created as a way for the OBD to check and make sure no hydrocarbons are leaking into the air.