For some reason all of a sudden my hatchback, when giving it gas it makes a sputtering sound like its not getting fuel. It did just happen to happen right after i put a tank of gas in. I've ran most of it out and have put in 93 octane today hopefully trying to get out the other couple of gallons and clean the system. It's getting worse. And i have no idea what is causing this, and it's starting to make me worried. Sometimes my car will run fine, and most of the time it's slowing down and sputtering when giving gas. Please help if you can.