I understand the "blank look" I get that often from the questions I ask...
it is surprising that a fixed orifice would work in an automotive a/c environment due to the various loads and compressor speeds. also, having the orifice drop the pressures before passing through the engine compartment sounds ludicris. why add all that heat to the cooling system?
when did the domestic manufacturers start using orifices? are you sure you are not looking at the strainer that is usually on the output of the condenser? if it was partially plugged up, it would react like an orifice and drop the temp on the liquid line.
I really cannot fathom a reason for them to do this, R 134a is ineffeciant enough, why add to the problem?
John