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The PCV vacuum supply hose is located under the intake manifold. It is not uncommon for this hose to tear and create a vacuum leak. Removal of the intake manifold is needed in order to get access to this hose as there is not enough room to get hands or tools into that small area.

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14y ago
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Q: How do you replace the pcv vacuum hose on a 2003 Mazda 6 4 cylinder?
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