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3rd Gen Protege/MazdaSpeed/P5/MP3 General/Maintenance Discussion for 1999-2003.5 Models Only (BJ Chassis)

Vacuum pressure

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Old August-10th-2007, 11:21 AM
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Vacuum pressure
Does anyone know how much vacuum the protege 5 is supposed to pull at idle? Mine is 22in, that seems kind of high. Does that sound like my timing is off?
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Old August-10th-2007, 11:25 AM
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That sounds totally normal to me. I know I pull something around there (22-24ish) and I max out the gauge when decelerating.

no worries!
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Old August-28th-2007, 02:38 PM
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and you can't adjust timing anyway...

And it is symptom of good compression!
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Old August-28th-2007, 04:04 PM
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^^ the timing could easily be off.. all it takes is misaligning the cam gears by one tooth (which is probably almost 10 degrees of timing) between the two cams, or between the cams and the crank pulley, or both
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Old August-28th-2007, 08:10 PM
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I am getting 22 inches at idle . which is good , When I am running on the highway i am at 14 inches at 120 kph (75mph)
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