Pressure is not normal.
High side should be 340 psi. Low side is 42 psi at around 2000 rpm.
Splash the condenser with water and if the low side pressure decreases, it could be the Orifice tube (expansion valve) if not you sould be looking for a new compressor.
ORIFICE (EXPANSION) TUBE
1. Expansion tube is located in refrigerant line between condenser outlet and evaporator inlet. Disconnect negative battery cable. Remove air cleaner and duct assembly. Discharge A/C system, using approved refrigerant recovery/recycling equipment.
2. Disconnect ABS modulator electrical connector. Disconnect A/C pressure sensor electrical connector. Separate liquid line fitting at expansion tube. Remove and discard "O" rings. Remove expansion tube from liquid line using needle-nose pliers.
3. If removal of orifice tube is difficult, remove as much of impacted residue as possible. Using a heat gun, apply heat 1/4" from dimples on inlet pipe. DO NOT overheat pipe.
To install, reverse removal procedure. Lubricate new "O" ring with clean refrigerant oil prior to installation. DO NOT soak "O" ring, as this will cause it to expand. Insert short screen end of orifice tube first. Evacuate, charge, and leak test system.
Tuesday, June 19th, 2012 AT 3:43 PM