1995 Nissan Sentra

IM ON HERE CONCERNING MY NIECE'S CAR IT HAS BEEN DRIVING FINE FOR ABOUT TWO MONTHS SINCE SHE HAD HER DISTRIBUTOR REPLACED BUT THE OTHER DAY SHE DROVE THE CAR AS USUAL AND IT DROVE FINE BUT AFTER PARKING THE CAR AND LEAVING IT OVERNIGHT ABOUT 8 - 9 HOURS IN APPROX. 40 DEGREE WEATHER SHE TRIED TO LEAVE AND GO OFF BUT THE CAR WOULD NOT START IT TURNS OVER FINE WE EVEN TRIED JUMPING IT JUST TO MAKE SURE WE EVEN WENT AND BOUGHT ANOTHER DISTRISUTOR AND PUT IT ON AND STILL NOTHING THE SPARK PLUG WIRES ARE IN GOOD CONDITION AND THEY ARE GETTING SPARK BUT IT WILL NOT CRANK I EVEN TOOK OFF THE VALVE COVER AND LOOKED AT THE CAMS AND LIFTERS THEY ALL SEEM TO BE FINE BUT FOR THE ONES THAT THE CAMS WASNT PRESSING DOWN ON I WAS ABLE TO SPIN THEM AROUND IM NOT SURE IF I SHOULD BE ABLE TO DO THAT AND I ALSO CHECKED ALL THE FUSES UNDER THE HOOD AND INSIDE THE CAR AS WELL AS DISCONNECTING THE FUEL LINE AND TRYING TO START THE CAR TO SEE IF IT WAS CLOG AND BELIEVE ME IT WASNT BUT I DID NOTICE THAT THE FUEL ONLY CAME OUT WHEN I ACTUALLY TRIED TO START THE CAR BUT NOT WHEN THE KEY WAS IN THE ON POSISTION LIKE MY OTHER CAR DID BUT I DONT KNOW WHAT ELSE TO DO DO YOU HAVE ANY SUGGESTIONS.