Help, 3.8 V6 EGR problem...

plastic EGR solenoid on top of EGR valve...are you supposed to be able to pull a vacuum off it? I used a mighty-vac and it wouldnt hold a vacuum, just bled it off. I broke the hard brittle vacuum line to this when changing a valve cover. I replaced the line but the car still stalls when going into gear when cold start and the idle seems to wander for the first few minutes like a vacuum leak. Driveable after that --- P0172 code thrown---- rich. Seems any vacuum line right off the intake should be vacuum tight. Thanks. Wife is going crazy and wants to take it to the dealership and overspend our money! 2002 Town and Country 3.8.