Join Date: May 2010
Location: Louisville, KY USA
Drives 2009 Sonata Limited 3.3
1997 Monte Carlo LS
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I have a coworker that had a similar problem on a different model.
He described the problem as more of a 'burping' of the fuel, so it may be a significantly different problem.
He would fill up the car, and at the last moment, just before the pump would 'click' off, the car would 'burp' or gently splash fuel back out of the fuel door and down the side of his car.
His mechanic finally found that a vent that allows the pressure to release, was stopped up. The pressure would build from filling the tank, and then fuel would be released back out around the nozzle.