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PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Project Phoenix, a 1964 Tempest rising from the ashes
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Old 06-25-2022, 05:46 PM
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lust4speed lust4speed is offline
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Forgive me for not going back and sorting through 21 pages, but is your AC system an aftermarket like Vintage Air? If so, all aftermarket systems cycle the clutch. For that matter the POA replacement tube sold by Old Air and others also cycle the compressor. Only a stock GM system runs the clutch all the time when the AC is on.

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1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 Catalina Safari Wagon.
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Old 06-25-2022, 06:07 PM
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64speed 64speed is offline
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Originally Posted by lust4speed View Post
Forgive me for not going back and sorting through 21 pages, but is your AC system an aftermarket like Vintage Air? If so, all aftermarket systems cycle the clutch. For that matter the POA replacement tube sold by Old Air and others also cycle the compressor. Only a stock GM system runs the clutch all the time when the AC is on.
It’s classic auto air

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Old 06-25-2022, 06:19 PM
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68WarDog 68WarDog is offline
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It’s classic auto air
I don't recall, but have you tried advancing the timing? Try 2 degrees at a time and see how the engine behaves.

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