no spark after changing northstar engines swap on 1996 Cadillac Seville

No spark I've changed motors the car ran for two days now it won't start I've changed crank position censor, cam censor, ignition mod . Still know spark checked all grounds 5times.??

2 answers
my suggeation is to stop throwing parts at it and take it to someone who will properly diag and repair the car.

Roy
Bad PCM need to replace it with an new one