The AC in my '98 Dodge Stratus is not working right. The outlet temperature seems to vary while driving. Sometimes when stopped the air temperature will get warmer, other times it seems okay. I have also noticed this while driving, but the temperature swing doesn't seem to be as great. With the engine at a fast idle the low side pressure varies from 30 to 40 PSI, at curb idle it climbs to 50-55 PSI. High side pressure at ambient temp indicates the system is fully charged. I'm thinking the expansion valve is faulty. If you have experience with auto AC systems I'd like to hear your thoughts.
TIA! Gyz