I need to know if I need a new cam sensor. Car cranks has gas but won't turn

DO YOU HAVE A CHEK ENGINE LIGHT ON, IF NOT, THEN IT COULD BE A TEMP SENDING UNIT, CK TO SEE IF YOU CAR HAS ONE OR TWO, ONE FOR THE BRAIN AND ONE FOR THE GUAGE, IF THE CAR HAS OVER HEATED SOME TIMES THESE GET DAMAGED, IF IT WAS A CAM OR CRANK SENSOR USUALLY YOU GET A CHECK ENGINE LIGHT AND IT THROWS A CODE FOR WHAT EVER SENSOR IT IS, A STRECHED TIMMING CHAIN CAN CASE A NO RUN OR A RUFF RUNING CONDITION.TAKE THE SHRADER CAP OFF THE FUEL RAIL AND PUSH THE SHRADER VALVE IN AND SEE IF GAS SQUIRTS OUT IF YOU DONT HAVE A FUEL TESTER GUAGE TO PUT ON IT, IF NOTHING COMES OUT THEN IT MAY BE A BAD FUEL REGULATOR, WHEN YOU TURN YOUR KEY ON LISTEN FOR THE FUEL PUMP TO PRIME, IT USELY PRIMES THE SECOND YOU TURN THE KEY TO THE ON POSSITION, IF ITS NOT PRIMING THEN MAYBE YOU GOT A BAD FUEL PUMP, TAKE A HAMMER AND BEAT ON THE BOTTOM OF THE TANK A FEW TIMES AND TURN THE KEY ON AGAIN AND SEE IF IT PRIMES, IF YOU LIVE IN A AREA THAT FREEZES, YOU MIGHT HAVE WATER IN YOUR FUEL THAT HAS FROZE UP IN THE FILTER AND THE LINES, CHANGE YOUR FUEL FILTER AND PUT HEAT IN YOUR TANK WITH YOUR GAS TO GET OUT THE MOISTURE, YOU CAN BUY HEAT AT ANY AUTO PARTS STORE OR WALLMART IF THIS ISTHE PROBLEM.