I had my 1990 300ZX retro fitted for R134a when the freon was low. Although I bought this Z new in 1990, it is no longer my daily driver. I am told by the AC tech that I have a very small leak in the compressor and discharge hose. He used a Freon sniff tester (I lost 1 lb of R12 in 2 years). According to the invoice, they put in 26 oz of R134a plus PAG oil.
I happen to have an AC manifold gauge and took a reading when I got home and got 34psi low side and 250psi high side. The ambient temperature was around 92 degrees. I had the doors closed, windows open and a box fan on high at the nose of the car. Center vent temp are anywhere from 48 to 58 degrees depending on whether I am using a regular temp gauge or an infrared non contact gauge (infrared gauge read lower).
Since this is a retro fit are these readings reasonable?
Wednesday, July 6th, 2011 AT 8:26 PM