I just bought this truck a month ago from the original owner. I have had 2 instances when the truck took a while to start. Pulled up to get fuel after driving for 3 hrs. and when I got back in to leave truck would not start. Took me 2 hrs. To,get it to start. Then just this weekend I pulled up to stop light and truck died and it took about 15 min to restart. Any suggestions. Truck has 180k miles and has been taken good care of.