Finding vacuum leaks - '95 90Q

[Joel Lenorovitz]

I'm getting some DTC's that say both the left and right bank fuel trim is too lean
as well as a L/R bank fuel system malfunction.  The hypothesis is that some air is
getting in by a way other than through the intake manifold and, hence, not being
measured by the mass air flow sensor.  Any tips on how to track down the source of
this problem or areas of common leaks in vacuum lines, etc.?  Thanks,

Joel

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