I have a 2004 Ford E350 van. I travel on gravel roads to get home and I am having an issue with filling up at the pump. I start to fill and at about 1 or 2 dollars it stops. Then I start it again and it stops a dollar or 2 later again. This happens until I get a full tank. I talked with a guy and he said it is because there is dirt or gravel somewhere in the mechanism where you fill. He asked me right away if I travel on alot of gravel roads. Another guy said this is not true. Here is another piece of info. I bought buick regal about a year ago and it was just fine filling up and now it is doing the same thing as my van. Stops every couple of dollars. Is there any reason to believe that the gravel and dirt is contributing to my problem?