Thanks for all the suggestions.  I Followed Ken Lewis's advice on building a
fuel pressure gauge for under $10.  It worked like a charm.  Pressure at
rail was 95 psi.  Pump is fine, fuel pressure regulator is shot.  New one
ordered, problem solved (this one anyway.)  I guess the sound I heard must
have been the pressure limiter inside the pump. Thanks again.

> Question:  Do I have another bad pump, or is there something else I should
> check?  If I do have another bad pump, could something have caused it that
I
> should fix also?