My A/C keeps going through warm spells. So I bought a gauge, a can of oil and r134a. In the information packet that came with the guage it said for an outside temperature of 80F (which it was) the low pressure side should be 40-50 psi and the high pressure side should be 175-210 psi. I added one can (12 OZ) of 134a then checked the low pressure side it was 50 psi. Then I went to check the high pressure side but I couldn't for the life of me find the connector!!!! Does anyone know where the high pressure side connector is????!!!! The system seems to working fine now (short test drive, will know more tomorrow), but I'd like to see what the pressure is on the high side.
Also, is 50 psi at 80F to high for the low side? When I first checked the system it was between 20-25 psi for the low side, is adding one can (12 OZ) of 134a with out adding any oil OK???

Last question, the low pressure connector says 6Nm Max, what the heck is that in psi (if they convert correctly), I couldn't find the conversion.

Thanks in advance...

Scott K
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Scott K - 1994 850 Turbo 96K miles