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Power Strokes
6.0 Tech
Vacuum at idle
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[QUOTE="jngreen, post: 881425, member: 679"] I doubt that you are actually pulling vacuum, I bet the gauge is calculating boost by subtracting normal atmospheric pressure, which is something like 14.7 psi at sea level. Since there is less air in higher elevations, subtracting by 14.7 actually puts your gauge further into thr negative numbers. [/QUOTE]
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