So, now what?

[Doug Yoder]

In the ongoing saga of my 87 5ks wagon...

Got a used fuel distributor from Chris at force5 (just in time, too, as
the starter in my other car went out the day UPS came...).
Installed it, and the car runs! But rough, so I put in some fresh gas and
injector cleaner, and install a new valve cover gasket, since it needed it
anyway (old one was in pretty rough shape).  Now it runs great!... for
about 4 days.
My fiance drove the car home from work, then we were going to go out
tonight, and had the exact same problem: no start, gas starved, almost no
gas coming out of the fuel distributor.
I checked the movement of the air flow plate, and the clearance on the air
flow sensor roller.  I'm pretty sure the new distributor didn't fail, so I
guess that something else is the problem... control pressure regulator?
There are two things here that have something to do with fuel pressure, I
think.  There is the control pressure regulator (little grey box sitting
on the front of the fuel distributor, and the fuel accumulator (i think
thats what this is - small cylinder between air boot and inside of
fender).  From what I can tell, there is good pressure at all three lines
on the side of the distributor, so that indicates to me the control
pressure regulator.  The current for the CPR looks OK (hovers around 0 mA
at idle).

So, now what? Does this still sound like a fuel system problem? I'm hoping
it's not the CIS computer... anyone have any suggestions or other
theories?

Thanks in advance,
-Doug