Year: 1989
Make: Jeep
Model: Cherokee

Refrigerant: R12
Outside Temp: 80

I don't think my system is cooling as well as it should. I just purchased a manifold gauge. I want to check it tomorrow afternoon, and charge if nessesary. I still have two cans of R12 saved from about 10 years ago. The sight glass shows what appears to be a white foam. I have a few questions.

1. Should I check pressure at idle, or at a higher RPM, like 1500 or so?

2. Should I check with the standard mechanical (fan clutch seems good) + factory electric fan? Or should I add an electric fan blowing into the grille?

3. What are the pressures I should see on this factory stock system? (Sanden compressor, expansion valve, etc...)

Thanks,
Terry

Follow Ups:

• Re: Another pressure question (want to do it right) Chick 9/28/2002 (0)