Is Sercon RJ12 ok to refill my system?
Is it the same as plain R12?
Thanks!

Thanks! First step is to find the leak(s).

What r12 can tap would you recommend when refilling?

4.3 L v6

Yes, no leaks.
I think I misread the gauges before. I checked them again.
low side - 40 (compressor off) 21 (when compressor is on)
high side - 102 (compressor off) 120(when compressor is on)
cycles rapidly....

O.K. here are my pressure readings...
at 79 degrees outside temp.

High side- 100 when compressor off and 110 when it runs (on and off ever 3 seconds)

Low side- 94 when the compressor is off and 97 when it runs (on and off ever 3 seconds)

Whats the probable cause for the cycle rapidly?

Thanks!

Like I said before!... I'm waiting on an adapter to test both side.

I read online to jump the switch and see if the compressor runs... I did it for 3 seconds.
What does that tell me?

Hi,
I'm trying diagnose my '91 Chevy S-10 R12 issues. I'm waiting on a GM high side adapter to test pressures.
But in the mean time, I jumped to lower pressure switch and the compressor kept running.
What does that indicated?
Thanks Kevin