I need the HVAC routing. Most of the links to the tubing are dry rotted. I
have went total away from factory on the engine. So I am looking for the
line or where the HVAC system gets its vacuum to work. The diaframs all seem
to work correctly.
Chances are there is a pinhole leak in the diaphragm that opens or closes
the intended vent,
judging from the age of the vehicle this is probably the case.
On the same note lets don't rule out the vacuum switch or amplifier.
check for vacuum at the switch and go from there, i believe the Chiltons
book for that year
had the schematic you're looking for.
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