Contour Enthusiasts Group Archives Forums General Troubleshooting 1995 a/c pressures ? what should I expect?

Greetings;
I have a 1995 Countour 4-cyl and the A/C is not
working well. Some cold air comes from the vents
but not as much as I expect .
What pressures should I see?
Currently steady state (off) pressure is
about 80 PSI. With the A/C on I get 45 PSI low
and 220 PSI high. Abmient Air is 78 degrees F.

Are these numbers OK? or should I add more R-134a?
Fully charged, what are the proper pressures
(say at 85 degrees ambient)?

Many Thanks in advance.
Gary Jablonski
Atlanta (hot and humid).
Please post reply or send private message to my
Coutour.org mailbox.

I'm from near Atlanta so I know how hots its been lately. Your pressures are definately not low. They look just a little high to me but that may be because your radiator fins are a little plugged. Take a hose and try squirting through all the condensor and radiator fins very thoroughly and see if that helps your air performance. Also try using Max instead of A/C because air inside the car is cooler than the outside humid air. The low presure should usually be 30-40 for R-134a. The high side pressure should be about 2.2-2.5 times the ambient temperature. Your pressures aren't really that far off but definately not low. So try the things I said to see if that helps if want. Hope this helps.