1990 integra starting problems

I have a 1990 integra gs 5spd and im having a difficult time getting my engine to fire. I have replaced the distributor,spark plugs,spark plug wires,ECU,and of course the main relay.The engine cranks but im not getting any spark.Someone please help.I have been at this for two weeks straight now without any luck.Yes my timing belt is fine.Thanks

Hi have your Ignition control module and coil tested those two items will cause a no spark.
Meck46