I have a 2000 sebring conv. (well daughters car) and have had nothing but problems with it since day one. Who ever had the car before me rigged it up pretty good. I'm down to a few things one i can't figure out..a vacuum line on the back left of the intake (pass side in the corner by the firewall) comes out 90 deg. rubber turn on it then into a small tube. They had the line cut with a screw shoved in it. I know it's not the EGR that's on the other side. but its the same size line. I have pics I can email.

It's on the top manifold the one you have to take off to change the plugs

2.5 eng.

 

Don't know about your '00 but my '01 has a sticker under the hood with vacuum lines shown on it that might be of some help. The sticker is stuck to the bottom side of the hood at the front.

 

Did you ever find out where that vacuum line goes? I just discovered that my 98 JXI 2.5 also does not have any tubing connected to this intake manifold connection. I am finding it next to impossible to find any diagram showing where this goes. The generic flow diagram on the sticker does not really help