ja51onpip

hi new here and would like some help. parked car up on drive and went in house went back 2 it 10 min later and it would not start so little checks i got it and there is no spark. i have put on a diff coil pack and cps and still nothing so i got a diff ECU and still nothing. Any help would be brill or i have cheked that there is power going to the coil and there is but dont know if i was doing it write. Cant use the tester tide dont know how to is better to say ????