I have now repaired the a/c on 2 LX cars, a '91 and a '92. I converted them both to 134a while I was at it. They both started out with working R12 a/c. When converting I had to install an orfic tube on in the high pressure line going into the evaporator to get them to cool. How does the a/c work with out this when running R12? I removed all the lines and found no orfice tube anywhere in either system. They blow cold now but would not work until I did that. Anyone have any ideas.
David
David