[swampfox44]

I've got a 1997 F250 HD 4x4 w/5.8. If I leave truck idling for a few minutes after fully warmed up,it surges at idle and shuts off and will not restart for about 10 minutes. It will spin over but acts if it has no fire or either no fuel.
Also,anyone know which mark on timing tab to time engine by? Top flat area or lower indented area? Thanks