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Old 04-11-2010, 10:16 PM   #3
Steve Tinker
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Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
I think what you are experiencing is quite normal.
Even with a new AOS, when I removed the oil filler, I could hear a vacuum being pulled and it lowered the idle rpm a little.
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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