I have a 96 XJ6 with 259,000 miles. The AC works fine part of the time, but on a long trip, with outside temp above 90 degrees, the AC outlet temperature will jump from about 55 degrees to about 67 degrees after about 2 hours (it will maintain this temperature for the next two hours). The 134A charge is correct and the receiver drier has been changed. The pressure on the low side at 2500 rpm will be about 24 psi, but after the temperature rises to 67 degrees, the pressure will drop to about 5 psi at 2500 rpm. The system computer will also show a code 23 (low 134a pressure) when checked. After stoping the car, and leting it set about 30-60 minutes, the system will operate normal. HELP!
Sep 5, 2007 at 2:54 PM