I have had my 94.5 7.3 to almost every mechanic I know, they have all put new parts on, none have solved the problem. It will run great all day, as long as you leave it running. If you shut it off it's like it loses its prime and it will crank all day and never fire. If you let it sit for an hour or so it cranks a lot and hesitantly starts. After sitting all night it pops right off. Anyone have any thoughts?