Originally Posted by nate13

There is a suction pump that goes between the saddle of the tank, and is driven by your main fuel pump. Replacing your fuel filter will help as there is less back pressure, but the thing to do is fish around in there and make sure it's connected and clean (and free of holes/ damage!). I have an ongoing issue with my 330 dying on the highway on less than a quarter tank, but only if driven extended periods. I've since changed my habits and fuel up at 1/4 or more. Too much money for such an odd problem!!