engine turning over but wont get spark

[JakeBrake]

background info:
about a year ago the motor in my ranger(4.0) went bad, it has been sitting since then. i pulled the motor and transmission and just waited to come across the right motor. a few weeks ago i worked out a deal with one of my buddys and ended up getting his complete running 95 explorer with a 4.0. I pulled out his his motor and transmission, unbolted his transmission and bolted mine up to the good motor. i then began switching over the wiring harness. i switched out the sensors that didnt plug up to my harness. then i ran into trouble, the cam sensors arent the same. the one in my 97 had a longer shaft and wouldnt fit. i went to the junk yard pulled one from a 96 explorer and put that in. i put the motor in and bolted it all up and went to turn the key. it turns over but wont start. i pulled out a spark plug and im not getting any spark. and im not really sure were i should start to find the problem.

ive been searching for a couple days now and cant find any helpful information

 

[chilsam]

Click

Can you hear a click when you turn the key? That relay contols the Ignition and fuel circuits.

 

[Earl43P]

Can you hear a click when you turn the key? That relay contols the Ignition and fuel circuits.

Does your Check Engine light come on in the Run position (before crank)?
If yes, the PCM relay is working.

 

[welder]

Your cam or crank position sensor is bad or has a corroded plug possibly. Friend had it happen on 94 ranger. We replaced the sensor with a new one and got spark. Check first to see if the sensor is bad. There should be a way to test it but we did not check it as we had tested everything else. The computer did not throw a code on it even though it was bad. Sensor is about $80 so good reason to test it first.
Good luck