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  1. Pressurized gas tank and Code 1494 in a 5.9

    Drivetrain Tech Center
    Hey Guys, My 5.9 was doing something strange I hadn't seen before. A couple of weeks ago it started building up air or vapor pressure in the gas tank. Every time I stopped to put gas in it, as soon as I'd depress the flapper valve with the gas nozzle, it would discharge the pressure. I mean...