Automotive Air Conditioning Information Forum

Your condenser might be appropriately sized as well.

In my car, I believe that Toyota used a serpentine condenser and R/D left over from their R-12 vehicles, and they cooled just fine for more than 29 years using R-134a.

... . On final effort we will do exact tare weight freon charge again, according to hood label = 24 ounces, no additives.
Excellent. Don't forget to empty the pressurized hoses into the low side. The hoses can contain up to 1/2-ounce of additional, previously weighed refrigerant depending on ...

Without also swapping the serpentine style condenser for a parallel flow, i would be sacrificing quite a bit of capacity and efficiency from what I’ve read.
Not necessarily.

For what it's worth, until recently, I owned a 1994 Toyota Camry V6 Wagon, bought new, with a factory R-134a system (first ...

I'm helping a friend with his Jeep WJ, 1999 Grand Cherokee 4.7, having insufficient A/C cooling.
How many miles are on the odometer, and does it have the original compressor?


The JGC Limited has dual temperature controls and hence dual blend doors. We carved into the plenum behind the glove ...

I think the system is still a bit low on refrigerant based on the pressures at 1,500 RPM.

You could try adding one ounce at a time while monitoring the pressures and center vent temperature (easier said than done, I know), not charging it beyond the 56 ounces net weight specification, and see what ...

There are just under 140,000 miles on the engine.
Ahhh, just getting broken in :D


You are correct in that the compressor continuously rotates the mainshaft whenever the engine is running. The psi was with the engine running, but I did not record the ambient temperature but it was probably in ...

I managed to get both compressor lines connected to the condenser and to the accumulator. I am also using nylog blue on all o-rings and threads. My next step is to get that evaporator flushed.
Using Nylog Blue is always a smart move when assembling a system. Flushing the evaporator should be ...

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These problems could be electrical in nature. If so, the system might have set a code, or codes, that can be read using a scan tool. Your local AutoZone can scan it for you, usually at no cost.

1. Using the Rotunda A/C Test Fittings connected to the evaporator inlet and outlet tubes and connected to my gauge set, I ran the vacuum pump for two hours and the gauge read (30 in-Hg). The evaporator has been sitting in a vacuum for more than a week now with no movement in the gauge. The ...