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Old 08-11-2017, 05:00 AM   #2
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,273
Your comments about no idle change and strong suction tells me you probably need to start with the AOS. The best diagnostics for the AOS is to used a digital manometer connected to an oil fill cap to measure the vacuum level, which should never exceed five inches of water (a relatively weak vacuum signal).
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