is the engine in your car right now?
check the ecu pinout article in the articles section of this site and it should tell you where the map sensor should go to, then you have to find that wire where it comes through the firewall (there will be three harness clips on the passenger side shock tower and one of those should have the map sensor wire hooked to it, then find the corresponding pin location on the engine wiring harness and hook the map sensor wire into that
good luck