Vaccum Pressure Inquiry??
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Vaccum Pressure Inquiry??
I have a 6400 mile Pettit ported engine My vaccum at idle is -13 lbs. constant. However when I am decellerating the negative pressure can go to -19 to -21. I have been reding on other posts that it should be -17 to -20 at idle. Is this normal? I checked and double checked the vac lines for any loose ones and all is good.
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