leathermang,

The reason why I did not put the recommended is because the pressure with 12 oz was 65 psi on the low side at idle. When I revved the engine to about 2000 rpm, the low side pressure dropped to about 25 psi. I do not understand why the system acts like this. From what I understand, the pressures on the low side increase when the engine rpm increases.

I have basic equipment. I have only a single low side gauge. My vacuum pump is a refrigerator compressor. I had it tested and it had a vacuum of 26 in hg at 2000 ft above sea level.

When I evacuated the system, I found leaks around the TXV. I tighted the fittings, and things were fine.