I just converted my truck to R134A... it cools well (we'll see when it's not 65 out).. but do I check the system pressure when the compressor is running or when it's not? I've got 45psi when it's not running and 27 or so when it's running with a charge of about 32 OZ (two 12oz r134 cans and part of another). am I good or do I need to get the comp. running pressure higher?
thanks, Bret