Mr. Anderson Posted July 2, 2015 Share Posted July 2, 2015 I'm finishing the last few things on the interior of the 91, so I thought it would be appropriate to ask this now: Since I have bought the car, the air has only come through the defroster vent. It will also come through the floor vents if the ECC is in BI-LEV or HEATER. There is no blockage to my knowledge in the system, and the A/C is a r-134 system that does blow cold air. The compressor and clutch engage as they should, so I'm betting that the system is functioning properly. Am I looking at a vacuum line needing fixed or is this related to the arm that runs to the top of the HVAC programmer? Link to comment Share on other sites More sharing options...
Blue90 Posted July 2, 2015 Share Posted July 2, 2015 Take a look at #12 by Padgett under my Electrical Problem post Link to comment Share on other sites More sharing options...
Mr. Anderson Posted July 2, 2015 Author Share Posted July 2, 2015 Take a look at #12 by Padgett under my Electrical Problem post I saw that one, but my cruise worked the last time that I had the car on the main road. The vacuum lines around there don't look very corroded either. Link to comment Share on other sites More sharing options...
Guest HuevosRanchero Posted July 2, 2015 Share Posted July 2, 2015 on mine the vacuum check valve at the middle of the firewall had neatly split in half at the seam. Impossible to see or even hear until I touched it. Link to comment Share on other sites More sharing options...
Guest Corvanti Posted July 2, 2015 Share Posted July 2, 2015 Brett, look at this: http://reattaowner.com/roj/kunena/reatta-community-forum/1213-90-reatta-no-air-coming-from-dash-vents Link to comment Share on other sites More sharing options...
Mr. Anderson Posted July 4, 2015 Author Share Posted July 4, 2015 This morning I found a badly disintegrated vacuum line going to the vacuum reserve tank. It literally fell apart in my hands. Hopefully this solves the issue because I did the tests in the A/C diagnostic section of the FSM and it appears that everything is working as it should be, at least according to the computer and the programmer. Link to comment Share on other sites More sharing options...
Guest PontiacDude210 Posted July 5, 2015 Share Posted July 5, 2015 On a car that age, you may want to inspect all your vacuum lines. I had several that broke but were sticky enough to collapse and not leak. Weird to try to track down. Link to comment Share on other sites More sharing options...
Mr. Anderson Posted July 8, 2015 Author Share Posted July 8, 2015 I replaced a vacuum line to the reserve tank and still have no luck with the A/C. The FSM says that if A/C blows out defrost but not vents then to check upper mode valve. Where exactly is this valve? If I could guess it would be all the way behind the dash where I can't get to it. Link to comment Share on other sites More sharing options...
Mr. Anderson Posted July 13, 2015 Author Share Posted July 13, 2015 How hard is it to get to the actuators that control where the air is directed? My vacuum lines are all good with good pressure. Link to comment Share on other sites More sharing options...
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