i have a 1995 Cherokee had a 4.0 originally, no motor when I got it so I purchased what I believe was 1994 motor 4.0 everything pretty much bolted up good, but iam having some issues 1. fuel rail on motor only has an inlet no return, chassis has both, pretty sure I can just buy the line with both, also the map sensor on the motor is next to the throttle body 3 plug connector, but the chassis has one on the fire wall with a 3 plug connector and some sort of air line which I would say goes to the intake. just looking for some insite on which map sensor to use thank you

 

One on throttle body is throttle position sensor. Other one on firewall is map sensor. Vacuum line runs to manifold. Swap fuel rail as needed.

 

Does it look like this ? If so motors newer than 95. Just locate older throttle body and hook vacuum line from existing one to intake.