2.3 of r12 would equate to 1.82 Lbs of R134, according to http://www.tirereview.com/wp-content/uploads/Articles/04_01_2013/1123954jpg_00000062824.jpg
It cant hurt to try it but the pressure is low compared to this chart, AC Pressure Chart | R-134a Temperature Pressure Chart

I did the full electrical test and the only failure was the speed sensor, so it got replaced too.
New belt as well, maybe I will tighten it a bit and try again