Super clean , no smoker . Volvo D13 motor , 825000 miles on it . PDF filter recently cleaned , 7th injector replaced . System working fine . Replaced : fuel pump , radiator , EGR cooler , starter , batteries , air compressor , all shocks , water pump , all cups and injectors at 550000 miles . Motor cranking not starting . Diagnosis , done by truck repair shop ( on hand ) , shows , there is no fuel pressure , due to injectors cups failure .