motor starts then shuts down

I just replaced the water pump,timing belt, bearings and tensioner.All of my marks are aligned and I rotated it twice by hand to make sure the marks are still dead on and they are.I tried to start the car before I put all the covers,alternator and pulleys on but the car trys to start and then dies...I pulled number 1 plug and wire to see if it fired and it does. This leads me to believe that the cam and crank sensors are still fine cause I think that if it would'nt fire at all one or both would be bad. Any help