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BPT bottom hose to engine - vac or no vac

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On my 97 Subaru Outback I was cleaning the engine port, that the BPT bottom hose attaches, the metal tube that goes into the engine. I noticed that there is no vacuum nor is there any air coming out of the tube, there is nothing. There is nothing when I rev the engine.


On my 95 Legacy that tube has air coming out of it.


Should my 97 have any air coming out of the metal tube, be it vacuum or blowing air?


It is my opinion that there should be something at that port.

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