1994 Oldsmobile 88 Royale will not start
 

My 94 Olds 88 just quit suddenly after starting right up. It cranks and cranks but does not fire up. I have checked fuel pump fuse and injector fuse. both good. any ideas? I have also examined the relay fuses (40 amp) in the major relay area at the rear of the engine compartment on the firewall. All good. I have examined the fuses in the fuse box and right auxilary fuse under the dash. all good. Battery is fully charged. serpentine belt is good. I'm stranded in SC. not a bad place to be stranded, but could use a clue. thanks!