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Old 12-22-2009, 08:52 AM   #4
Registered User
Join Date: Apr 2009
Location: Bothell, WA
Posts: 279
Try removing the oil filler cap in the trunk with the engine running. If it is difficult to remove and/or makes a sucking sound - you probably have a failing AOS.


'01 Boxster S, 51k miles
'05 Mazda 6 Grand Touring Wagon
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