Bad boost gauge?

87LimitedT

Just getting started
Joined
Dec 11, 2007
Took this gauge out of my 83 and noticed that its showing vacuum with it disconnected, is the gauge useless or is it still good?

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Google hydraulic shops in your zip code. They can recalibrate gauges.

currently cutting it the F loose
 
No problem. Done it many times with my SW gauges.

currently cutting it the F loose
 
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