Hello,

Just returned from vacation with my mint 88 760 t-wagon with 96K. Great hi-way car.

Before I left my a/c was not blowing out of the vents upon acceleration. I poured over the FAQ on this and even spoke to a dealer mechanic. The auto fan ran great, the auto temp ran great, and at first, the auto position selecter.

FAQ's and the dealer mech told me to pinch off the yellow wire on the near most dual wired vacuum pot on the back of the control box...the dish on the end with the blue and yellow wire. There was also a more elaborate "hacksaw" repair to replace the dishpot if desired.

I doubled over the yellow wire and pinched it off with a black spring loaded paper clip...should have easily closed vacuum. Next morning I took off for St. Louis. Pooo...did the same damn thing...as soon as I pulled Turbo boost, no air from the vents, as soon as I was out of boost air came flowing back through.

Acceleration without Turbo did not affect it. I had replaced one of the check valves and all the hoses at the vacuum T under the hood. Used a new dealer check valve on the white line...older valve on the black line. Lines looked great to the firewall.

Was running good for a long time with all 3 wheels on "auto" losing vents at turbo boost. Which of course was any noticeable power increase especially on cruise.

After stopping at a rest stop and heading out, I noticed the vents wouldn't open at all with the vent indicator wheel at "auto" and without turbo boost...they were opening fine all along on "auto" prior to boost.

I nearly panicked trying to get the obvious cold air I could hear in the dash to come out some where...manual "face" setting did this...Thank God.

I was too scared to try "auto" again on the trip and left it in manual "face" selection, of course vents closing whenever boost was applied. I had pretty good air on the trip except on the hills...it was very hot in Kansas and Missouri.

I unhooked the spring loaded paper clip from the yellow line in St. Louis, this made no difference on the way back. I am sure that double bend with the clip applied shut off vacuum, I know this is a vacuum problem somewhere...but where?