2002 7.3 143k, about 2 months ago stopped for a beer on way home and no start, on last try fired up ran fine, today stopped for breakfast on way sledding and again no start. Got a ride home and came back to tow and it fired. Runs great, new fuel filter,new batteries. Used starting fluid today and would pop off but die, so no fuel, I know not a good idea but I know it's a fuel issue now. Thinking cps or ipr. Any help appreciated. First time temps in 50's and today in teens.