Well recently we stole some gtas out my dads pickup to get gas in the Duster. The car was running good for about and hour and a half then it started to sputter and back fire when you give it gas. I have filled the tank 2 or 3 times since then thinking it might be a water in the gas issue and the water was not pushed out yet. Now I dont think its a water issue. Do you think it might be the spark plug wires? Its a 318 any feedback would be good.