last month i bought a 1990 300zx, the motor was bad. production date is 9/89. i purchased a motor from a reliable salvage yard here in new jersey. the production date of the car is 3/90. i installed the motor into my car. now, the car cranks with fuel pressure and injector pulse. i had no spark. i tried checking for bad grounds. that took me nearly 3 days. now, i took the car to a shop. the shop wound up having good spark, but no injector pulse. we thought maybe the ECM was bad. i bought the ecm from the same place that i bought the motor from. numbers matched. he installed the ecm, and now i have injector pulse but now i dont have spark. i am so lost right now.. if anyone has ideas, please let me know.. thank you.

it sounds like something isnt matching...but i really dont have any idea as of how to figure it out....i apologize