Correction to the above , I have NOT tried rolling the window down with the AC on again . TheReaper!

Did we ever establish if this is R12 or R134a?

I have heard some stories, but,

And it is still doing the same thing......my guess is a pressure cycling valve that is not cycling all the time....

It'* R134a , it was done by the previous owner but it wasn't tagged for some reason ?

TheReaper!

I meant pressure cycling switch on the accumulator, not pressure cycling valve...

R134 and R12 use operate at different pressure. Your refrigerant might be low, R134 should be filled at 80 percent in R12 system. My 1989 was retro fitted with R134 and the I had to turn the screw in the pressure switch 1/4 turn cc to keep the compressor from cycling too early.

Another update .

Like I've said previously , on auto the AC runs all the time summer or winter , but the AC shuts off on ECON . If the window is down the AC freezes up summer or winter when set to auto . Recently I found a used reasonably priced controller on eBay for $35.00 , I installed it myself but it operated the same as the original . Not a big deal $35.00 and a couple of hours work , at least I know now that'* not the problem . In the winter I unhook the wiring to the AC under the hood because if I forget to turn the ECON button on the AC goes on . It'* not the end of the world but I would love to figure this out .

Any more ideas ? TheReaper!