Calling all Forester mechanics
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This is a discussion on Calling all Forester mechanics within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I have a puzzler for ya'all. My wife parks her Forester in the garage and at random times I walk ...

  1. #1
    Water.....sometimes waves rqjoe's Avatar
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    Calling all Forester mechanics

    I have a puzzler for ya'all. My wife parks her Forester in the garage and at random times I walk by it and hear a buzzing/humming from under the car between the rear wheels. I am pretty sure it has to be the fuel pump running. But why? It'll just start doing it at any old random time for several minutes at a time. No key in car. Car cold. Car hot. I never hear the WRX doing this, just the Forester. 2015. 0 problems or other issues. Any ideas why it does this? Thanks.

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    Super Moderator (Actually a SuperSpy) SD_GR's Avatar
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    First, make sure it's the pump. If it's the pump making noise, then the same noise should be apparent when the pump is definitely on -- since you may not hear it with the motor running, turn the key to the ON position and listen.

    I suspect evap and/or other emissions stuff going on.

    I should add I have a car that does something very similar, but it's only a 1991 model so I've not had a chance to look into it yet (read: I'm not worried... at all... it's been decades...).
    After a little while I felt a little better, but very little. I needed a drink, I needed a lot of life insurance, I needed a vacation, I needed a home in the country. What I had was a coat, a hat and a gun. I put them on and went out of the room. Fairwell, My Lovely
    WRX Info Links, Courtesy TheJ
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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    THE Resident Non-shifter JaySin's Avatar
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    Calling all Forester mechanics

    It's the evap system. My '16 WRX does it occasionally. I thought I had electrical problems in my garage until I figured out what it was. Lol
    It's normal.
    Edit:
    http://www.subaruforester.org/vbulle...ge=1&_k=umt448

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    The one thing that unites all human beings, regardless of age, gender, religion, economic status, or ethnic background, is that, deep down inside, we all believe that we are above-average drivers.
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    http://www.fuelly.com/driver/jrc1978

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  6. #4
    Registered User Firefighterjake's Avatar
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    My wife's 2015 Legacy does this as well on occasion.

  7. #5
    Water.....sometimes waves rqjoe's Avatar
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    Thanks all. Kinda figured it was normal, but wasn't 100% "sure" what it was. Also never would have thought evap. Does that mean it would be an air pump maintaining a pad pressure in the fuel tank? I am surprised I don't hear it in the wrx. Yeah sd-gr, I also probably would have never actually done anything about it either since car runs fine. Just one of those things that makes me go "hmmm?" Thanks all.

  8. #6
    Water.....sometimes waves rqjoe's Avatar
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    Oops JaySin, just read your link and see the leak check thing. That explains it.

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