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Weird Hum Noise on Cold Start

Discussion in '2nd Gen. Builds (2005-2015)' started by Young Ginger2007, Nov 5, 2021.

  1. Nov 5, 2021 at 8:01 AM
    #1
    Young Ginger2007

    #1
    Young Ginger2007 [OP] Member

    Joined:
    Sep 13, 2021
    Member:
    #377003
    Messages:
    10
    Hey yall. I have a 2007 tacoma prerunner. I noticed that recently when I crank it on a cold start, when I put it in reverse and ease off the brake it makes a low humming sound. Its very noticeable. And when I put it in drive and go down my drive way without putting on the gas, it does it as well. It doesnt do it when I accelerate, but does do it when I decelerate. But after the truck warms up it doesnt do it anymore. What could this be?
     
    Young Ginger2007, Nov 5, 2021
    #1
  2. Nov 5, 2021 at 10:28 AM
    #2
    INSAYN

    #2
    INSAYN Well-Known Member

    Joined:
    Dec 2, 2016
    Member:
    #203898
    Messages:
    2,192
    Gender:
    Male
    PNWet, Oregon
    Vehicle:
    '17 TRD OR DCSB 6MT 4x4...'97 Taco XtraCab 5MT 4x4
    DIY Fabricobbler.
    Manual/Auto?

    Miles on the rig?

    Geographical location, cold/warm climate?

    Any recent work performed on it?
     
    INSAYN, Nov 5, 2021
    #2

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