Well, one diagnostic for a vac leak of unmetered air is to smell the exhaust. If you are leaking unmetered air, the exhaust will smell acrid and burny to the nose. If you are leaking metered air, it will smell normal. Metered air will be leaking around the fidle valve or ISC or throttle plate or bypass air channel. Unmetered air will be leaking at the manifold joints/shafts, vac line or ports, etc. Sniff and report.

Not responsible for advice not taken...