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Vacuum gauge


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   I am curious if anyone on the forum has a vacuum gauge in there instrument panel.


   And what is it for.    What is your normal reading at idle and at highway speed.


   Curious,   Vern 

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As a side note:  I suggest y'all look at your owners manual before getting worried about a little air filter restriction.  Most trucks have a restriction indicator on/near the filter housing.  It will tell you when to replace or clean your filter.  On our farm equipment, the manual says when it indicates service is due, wait until the next servicing, which for us was the next morning.  Remember, the more clogged the filter, the better job it does at removing particulate.

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