Crank no start

Crank no start I replace the fuel pump getting fuel I
replace the distributor including the camshaft
position sensor I replace the crankshaft position
sensor I replace the coil I O2 sensor map sensor
air idle control valve throttle position sensor and
last of all I replace a computer still no spark any
information will help I've disconnected the
crankshaft position sensor connected it still no
spark I did have spark one time for about 10
minutes and that's as far as I got now no spark