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Thread: Mystery Hose in Engine Bay

  1. 10-18-2023, 05:42 PM #1
    DOUGS73E
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    Mystery Hose in Engine Bay

    Today I took off the air cleaner housing to view the MFI pump. When I went to reattach the three different size hoses at the bottom front of the housing where the flame trap cartridge is located I discovered a fourth hose to the left siting on top of the MFI pump (see arrow on photo). I don't remember this hose or where it attaches. It appears to be a fuel evaporative control system type hose?

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    Doug Dill

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  2. 10-18-2023, 06:04 PM #2
    1969911T
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    Where does the other end of the hose go?
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  3. 10-18-2023, 06:15 PM #3
    DOUGS73E
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    It goes out of the engine bay at the front left corner.

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    Doug Dill

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  4. 10-18-2023, 06:15 PM #4
    gled49
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    It should go to the nipple on the back of the fan shroud. It provides the positive pressure for the charcoal canister. The air cleaner hose provides the negative/suction side to create circulation thru the canister to purge gas fumes.
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  5. 10-19-2023, 09:36 AM #5
    DOUGS73E
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    Quote Originally Posted by gled49 View Post
    It should go to the nipple on the back of the fan shroud. It provides the positive pressure for the charcoal canister. The air cleaner hose provides the negative/suction side to create circulation thru the canister to purge gas fumes.
    Yes! That was it. Thank you.

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    Doug Dill

    1973 911E Coupe
    PCA #1987109761
    Early 911S Registry #548
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