Sounds like your low on R134 gas. The LOW-side should to reading about 30psi and the HIGH-side should be between 180 to 210psi- this is at full charge. The full charge on the Chevy is 3.75lbs of R134.
Gettin the A/C ready for the hot summer
Today I decided to hook my uncle's set of R134a gauges up to the sub. With the A/C on full blast, max a/c, and the temperature lever as cold as it goes, I was reading around 25psi on the low side and around 158-160psi on the high side when the compressor kicked in. I'm trying to figure out if the freon is at the optimal charging so that I can get the sub as cold as I can. The A/C from the factory has rear air, however, the previous owner of the truck had the rear a/c lines capped off at the T-points in the freon lines in the engine compartment, so as of this moment, I'm running the front a/c only. So, can the A/C do better than it is already? I've looked a little on google for help, but what I've found doesn't seem to be very clear and concise. It all seems to think you have a decent understanding of A/C servicing. Any help is greatly aprreciated in this hot New Orleans weather. 
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as an update, yesterday I bought a couple cans of freon, and charged the system up to 31-32psi on the low side. The high side was somewhere around 225psi,but the truck was in direct sunlight all day so from what I understand, that's ok. Now the A/C does get noticably colder and the compressor doesn't kick in and out like it used to, so I'm happy . I still need to get the back repaired, but at least I can bear the heat a little better with a colder front. Thanks all.
. I still need to get the back repaired, but at least I can bear the heat a little better with a colder front. Thanks all.1 - 7 of 7 Posts
