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Help diagnosing sound from air intake when engine shuts off

Discussion in '1st Gen. Tacomas (1995-2004)' started by outhunt89, Oct 7, 2011.

  1. Oct 7, 2011 at 10:15 PM
    #1
    outhunt89

    outhunt89 [OP] Member

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    Let me start by saying I have had a great time lurking on the forum and learning from all of the great information and builds on here.

    Today I noticed that after running the engine on my 3.4 03 tacoma for a little while and shutting it off I could here a short hissing sound that lasted about a 1/2 second from around the air intake/throttle body area. the hiss continues for a few minutes after the engine is shut off and happens every 30 seconds to a minute.

    does anyone have any ideas on what could be causing this? I checked all of the intake hoses and clamps and everything feels secure and tight.

    any ideas would be greatly appreciated!
     
  2. Oct 7, 2011 at 10:20 PM
    #2
    00yotasr5

    00yotasr5 Well-Known Member

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    well if its from the air filter then its normal, could be gaskets leaking:notsure:
     
  3. Oct 7, 2011 at 10:21 PM
    #3
    I Liquid I

    I Liquid I Well-Known Member

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    ... all joking aside, my 06 Tacoma does it. So does my 02 Jeep.

    It might just be releasing pressure somewhere. I would not worry too much about it. Im sure others here will post the input as well soon. :)
     
  4. Oct 7, 2011 at 10:25 PM
    #4
    outhunt89

    outhunt89 [OP] Member

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    its higher than the air filter, closer to the throttle body
     
  5. Oct 8, 2011 at 8:30 AM
    #5
    Speed Freek

    Speed Freek Turbo lover!

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    Thats normal, they all do it. The Engine snake!!!
     
  6. Oct 8, 2011 at 11:17 AM
    #6
    twfsa

    twfsa Well-Known Member

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    Compression leaking down.
     
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