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Thread: Vacuum Hose to the FPR

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  1. #1
    Join Date
    Dec 2003
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    1,640

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    Do a stomp test to see what codes it might have as a starting point.
    Bellevue WA
    90 535iM - not much stock remains. 3.7 liters, ported head, cammed, 3.73 diffy, M5 brakes, MAFed, yadda yadda yadda
    86 Porsche 951 - Track Toy

  2. #2
    Join Date
    Dec 2003
    Posts
    1,640

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    Good work.

    There are two 3mm vacuum hose lines that connect under the intake manifold. Hose one is your FPR hose; hose two is the one that T's off the valve cover vent.

    If you feel under the base of the intake manifold just behind the block to manifold brace you should find where they connect. If you had a mirror and light, you might be able to see them.

    Can't recall for sure, but you may need to disconnect the fuel hard line mounting bolt at the base of the manifold to make a little extra room. Been a while since I've had to deal with these.
    Bellevue WA
    90 535iM - not much stock remains. 3.7 liters, ported head, cammed, 3.73 diffy, M5 brakes, MAFed, yadda yadda yadda
    86 Porsche 951 - Track Toy

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