Engine is supposed to run at 1000 rpm for the pressure checkes. Like I said, it won't stay at that rpm with the IAC motor connected - it will shoot well above that, so, unless you disconnected the IAC, the meausurements were not under the correct conditions (which also include cabin fan on high, recirc. mode, and temp. dialed down to 'Lo').
Surprised it took two complete cans (12 oz. each?). Do you maybe have it slightly over-filled now? Total capacity is 25 ozs., and apparently there was some still in it if the compressor was coming on at all.
Both engine cooling fans are working?
And - yes, maybe there's an expansion valve problem as you suggest.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs