Bad boost gauge?

[87LimitedT]

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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[87LimitedT]

?

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[notacarlo]

Needs to be recalibrated.

currently cutting it the F loose

 

[notacarlo]

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

currently cutting it the F loose

 

[87LimitedT]

Cool thanks!

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[notacarlo]

No problem. Done it many times with my SW gauges.

currently cutting it the F loose