440 wont start when hot.

Well I drove my Duster to get an alignment today. When I got to the alignment place I was at 190 degrees snd still had 8 lbs of fuel. double what I had before. But when I got home I decided to double check the gaugen again and it was back to zero. So its better than it was but not quite there yet. Should I invest is a fluid cooler and run my fuel through it? or would that help?