1998 Forester What does this do?-see picture - What is this.jpg (0/2)

Discussion in 'Subaru Forester' started by AJay, Jul 13, 2006.

  1. AJay

    AJay Guest

    Hello everyone.

    Attached is a picture of my air filter / intake system. Just after
    the air filter but attached to the plumbing is an enclosed cylinder
    type device. Does anyone know what it's function is and what is it

    Thank you for any responses.

    AJay, Jul 13, 2006
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  2. AJay

    AJay Guest

    AJay, Jul 13, 2006
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  3. Likely the MAF?

    Carl 1 Lucky Texan, Jul 14, 2006
  4. AJay

    strchild Guest

    Are you talking about the empty canister that is attatched so that it points
    in the general direction of the firewall, on the the air intake just after
    the MAF? I had one of those on my 89 GL Turbo wagon and I have one that is
    curved but otherwise the same on my 93 Impreza. I have always wondered what
    it was and what it did myself, so if that's what your question is, I'm all
    ears too. (o; It seems entirely passive, just a plastic cylinder, but it
    must serve some purpose or I imagine Subaru would not spend their money and
    ours to engineer it into the air intake system.

    strchild, Jul 20, 2006
  5. AJay

    AJay Guest

    Hi Brian,

    The answers I received is that it is a type of impulse resonator. This
    somehow give a more accurate picture to the MAF of what is going on in
    the manifold and also contributes to slightly more power.

    BTW I was pointing to the tube like structure about 1.5 inches in
    diameter with a slight bend pointing toward the front of the car.

    AJay, Jul 20, 2006
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