My friend recently bought a blown up b20 swapped crx and had a running totaled crv we swaped the motors at knock sensors where the same but the crank sensor on the new motor didn't have a plug on the harness for it so this car won't run it starts on a bump start but don't know what to do about that crank sensor and if it's our problem any ideas

 

If your using an obd1 ecu you don't need the crank sensor. If using an obd2 ecu there's a bypass you can do. The motor should start and run with the crank sensor disconnect. So your problem cloud be something else.