Where is the AC orafice tube located on a 1993 Ford Thunder?

Question

The high pressure line is icing up. We are converting from R-12 to R-134

Answer 1

In the lower line going into the evaporator, it is pushed up in the line and a small pair of needle nose pliers will get it out. I think you will need to be sure not to add as much freon that the 12 calls for. Cut back at least .5 onces

Answer 2

It will be located between the condenser and evaporator.Usually at a mechanical connection point. Also you need to flush the mineral oil from the entire system,it will not mix with the new refrigerant.Synthetic oil is needed.