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Old 04-12-2004, 04:42   #1 (permalink)
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A/C distribution at low vacuum

Have a problem on the XG (efi) that when I'm running up a hill for too long that the vacuum keeping the a/c running through the vents drops to a point where the air circulation switches to demist - the default

I know on my early 70's Cougars there is a small can in the heater control system to retain vacuum in the line.

Is this a common problem or do I have something wrong in the HVAC system? i would suspect it would be common across XE and XF as well?
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68 Cougar XR7 (302W), 69 Cougar Convertible(302W), 70 Cougar XR7 Convertible (428CJ), 70 Cougar Eliminator (351 4V), 77 Cougar Villager Waggon, XY Ute (302W), XG Ute (IL6 XR6 replica)
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Old 04-12-2004, 05:56   #2 (permalink)
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Re: A/C distribution at low vacuum

Can't help you with a fix, but used to happen with my XF Ghia, especially towing a car trailer up a long grade.....
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