| AC Vacuum Controls [message #343728] |
Mon, 27 May 2019 17:44  |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma:
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My coach is a '75, so the dash air conditioning airflow is pretty dismal in the first place, but there is almost no air at all coming from the registers at the right side of the dash. I started checking vacuum to the servos and found no vacuum at that line. Working my way back, I found I didn't have any vacuum coming from the engine to the little round vacuum can on the firewall.
Somehow, the line had come disconnected from the intake manifold. I re-connected it, thinking that would fix everything, but it is still not working properly. Now, when I start the engine, the recirc door closes, and the heater valve closes, but there is still no vacuum at the right side servo. Also, when I turn on the heater, the heat control valve stays closed. It looks like all the vacuum lines are hooked up to the dash control correctly, but things are still not operating like they should be.
Any ideas?
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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