Change the orifice tube to a Smart VOV orifice tube.This is a self adjusting orifice tube which adjust automatically according to the amount of pressure being produced by the compressor.
This self adjusting tube is available online for $18, including shipping from Sherco Auto Supply.
This remedy is for all ford van which has the tachometer on the dash. This remedy will drastically improve the air condition on these vans. I could now actually have my van in park and actually have cold air coming out the vents.
It this fix works for you please let me know.
Review about: Ford Van.