AC recharge

[Eric Huppert]

Going south for a couple of days and decided to recharge the AC on the 200
20v.

Evacuated system (28" of vacuum) for over an hour, then turned off and let
sit to see if any leaks. (Was some pressure prior to starting evac, but not
enough to kick in compressor)

Audi says 31.7 ozs. for retrofit to 134. (http://www.20v.org/r134a.pdf). 

Pressure: Bentley calls for 19-46 lbs (low) and 154-255 (high)

I now have 36 ozs and my low side pressure is 22 lbs. As soon as I come off
idle and maintain rpm the pressure drops and compressor disengages/cycles.
High side is around 200 or a touch less. Ambient temp was around 65...
Plenty cold inside car, mid 30's.

Thinking I'm still low pressure wise. Guess I'm going for another can in the
morning, last ditch effort as I need to leave on Sunday!

Been driving the car local for a couple of weeks on and off, looks like I'll
be doing around a thousand miles.... Not quite the way I like to sort things
out, but you don't get to pick funeral dates!!!!!....

Anyway, anyone BTDT with the recharge?

Eric