2000 jeep 4.0 vacuum diagram

SOURCE: 2003 Jeep Vacuum Diagram

THERE SHOULD BE A EVAP/VACUUM DIAGRAM UNDER THE HOOD ON A WHITE STICKER. SOMETIMES THEY ARE ON THE BOTTOM SIDE OF THE HOOD ITSELF. I HOPE THIS HELPS. PLEASE KEEP ME POSTED THANKS FOR USING FIX-YA AND FOR AN HONEST RATING/COMMENT. GOOD LUCK

SOURCE: vacuum diagram for 1980 cj7 jeep 2.5 motor

You can use any vacuum port on the manifold for that. If you want to mess with it a bit, if you have an open port on the carb that is above the throttle plate, you can use that and see if performance is better. Some engines like it and some don't, but it's not like you have to take the engine apart to try it!!