Please put some paragraph breaks,capitals and punctuation in your text. It makes it easier to read and sort things out.

Your comment about the green manifold line being connected directly to the vacuum source makes me wonder. From your description, it sounds like a couple of lines may have been swapped near the 4-way connector and the check valve for the reservior. Sometimes those lines get knocked loose during oil changes and get reconnected incorrectly.

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Sam

84 300SD 350K+ miles ( Blue Belle )