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					Originally Posted by Jake Raby  Engine braking produces the highest vacuum that the system can see. All you need is a manometer to attach to the oil cap to see these things.
 And its all you need to check the health of an AOS.
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Jake, is this something that basically any mechanic can quickly/easily do?  Don't know if you've read any of my "AOS?" thread or not.  I've got an appt to replace the AOS, but they're tied up for a couple of weeks before they can work on it.  I'm just curious whether I can easily figure out if it's safe/advisable to drive the car in the meantime.
Any input appreciated 
