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Ike no sweat.
I got what your saying now.
yes there is a hose missing from the check valve to the vacuum port in the OP picture.
My thought has been that the black end of the check valve had be inserted directly into the vacuum port by a previous owner.
And as Colacharlie was trying to find a vacuum port to connect a vacuum gauge to he pulled it loose because the port was turned down so the check valve was under the collar.
He saw the check valve first then latter found the vacuum port to the side.
The reason I thought this was because in the pictures you can see Charlie has hose clams loose, a AOS hose disconnected and what looks like a screwdriver handle in the picture.
Also there were no codes for anything.
except for the no codes everything above was a guess at best.
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