R-12 AC pressure readings - need freon or not?
I first checked high and low side with engine off -- pressure reading at both was just under 100psi.
Pressure at low side after running AC for awhile was about 33psi -- high side read 190psi.
Are these readings low, high, or just about right? Sight glass shows moving milk.
If low, approximately how much freon will it take to get a full charge?
TIA, as always!
'91 300E, 214K miles
Last edited by pmizell; 07-05-2002 at 07:44 PM.