The PO of my 87 Westy burned out the AC compressor. Instead of replacing the unit she just cut the wires and belt. Could the cut wiring have an effect on the "surging" idle, seeing as there is supposedly a switch between the AC compressor and the idle stabilizer valve to increase to bump up the idle with the AC is on, similar to the full-lock switch for the power steering?

By the way, Bentley shows no such switch for my '87. Does't show controls on the dash for the AC either.

How would I check this? Ground the switch wire perhaps?

Dear god let it be... I'm completely out of ideas otherwise and the thing is practically undrivable without disconnecting the 02 sensor. Then mileage goes to poop.
Bob W.