vacuum specs-96 buick park avenue 3800
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I m only getting 14 lbs on a vacuum gauge for a 3800 vin k engine. I have replaced the upper manifold and gasket and checked all vacuum hoses and also pinched off the vacuum hoses one at a time and the vacuum will not raise. There is a leak in the fuel tank filler neck or hose I noticed the last time I filled the gas tank. Will that leak be causing low vacuum since the tank will not pressurize? I am not getting any computer codes such as a p0441.