80tq- lean mixtures/low boost (long)

[blarson at Zeiss.com]

Update as of this morning,

I am still having teething problems with my 88 80tq project,
and I am hoping the collective can help me out.  The wiring
is done, and the car starts and idles fine.  No trouble
codes flash (4444), and the knock light does not turn on
when driving, but...  The car is sluggish (compared to my
chipped 5ktq's) , and the boost does not rise to the level
it should.  I have a electronic mixture gauge installed, and
it shows the boost being way lean any time the analog boost
gauge has more than about 1-2 lbs boost.  Something is
making the mixture lean, and that is causing low boost
pressure and timing retard?  Not going into closed loop?

The car has a mc-1 fuel system, with a MAC11, urq airbox
lid and igloo.

I have excluded all of these items already;
Changed fuel pump (old one was noisy) and fuel filter
Set warm idle mixture to OXFV duty cycle of 42%
Replaced intermittent connector to WOT switch
Tried two different WOT switches which both tested good
Bridged WOT connector at idle, and WGFV does cycle
Unhooked MF Temp Sender connector, but boost and mixture do
not change
System fuel pressure 90psi with bleed own to 50psi

I am thinking of trying this next;
Differential fuel pressure
Hunt down all temp sender resistance values
Does anyone have any other ideas?

Thanks,Brian