I also fail to see how an Italian tune up and vacuum issues are related.

My guess is that when he did his inspection, he jiggled some vac connectors just the right way to get them to seal again. It is likely a short term solution, though.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge