Did an engine swap on a 2002 chrysler 300m With a 3.5 H.O. But crank no start on 2002 Chrysler 300M

Cant figure out why I am not getting spark to this engine. have checked crank and cam sensors. both seem to be working appropriately. also I am getting fuel.Please help!!!

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1 answer
what was the original engine? could double check all wiring is tight and grounds are good, something may be missing if the car did not have the H.O. motor to start with, there would be a difference in the ECM programing and or fuel pressure maybe different.Also make sure coils and plugs are good..