I had some trouble with my 98 GT starting so I replaced the fuel filter and I had it running fine for a while. Then the other day I was coming off the highway and it stalled. When i tried to start it nothing happened. I had about half a tank of gas but it seemed as if there wasnt any fuel getting to the engine. I pushed it a good distance and managed to get it started again about an hour later. I havent had any problems since then but it still makes me worry. Any thoughts on what it could be and what I should do to take care of it?