1997 Ford Mustang won't start!!

I know it's not the starter! I had the plugs replaced and the fuel filter replaced as well! Now I think it could be either the cam or crank sensor?? I am not sure! This car is getting gas but not sure about fire!! HELP!

does the starter even turn the engine? can you hear the solenoid clicking?
did run before this happened.

Pull the main air nozzel at the intake spray some starting fluid in it if it starts its a fuel problem.
Pull a spark plug ground the plug and check for spark if you have spark its a fuel problem.
If you have no spark check the crankshaft position sensor.