I don't know about your's, but I have a 91 as well
and it quite running. I have a few scan tools with
GM early mid diag cartridges, and will scan the
live data stream once I get it going. Once I get
info from my 91 with the 3.1, I'll pass it on to
you and others. I am going to get to the bottom
of the surging, etc, but first to get it running.
I'll let you know what I find and yes if you hear
muted clicking under the manifold, it very well
could be the inj's since all they are electric mech
output devices that open and close. Have you
tried running a noid light on any of the inj's
wiring ? I have a feeling these Multec inj's
can clog up pretty easy causing a crappy
spray pattern-dripping result. We'll see..