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Vacuum measurement?

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Old Oct 12, 2004 | 02:08 PM
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1999Porsche911's Avatar
1999Porsche911
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Default Vacuum measurement?

Anyone know what the reading on a vacum guage should be at idle for the 3.4 engine?
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Old Oct 13, 2004 | 12:36 AM
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I had a vacuum guage hooked up for secondary air diagnosis and it was reading about 17 inches. I believe it was a 2000.
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Old Oct 13, 2004 | 10:03 AM
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Thanks for your response. I have about 16 inches at idle of 800.
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