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Weird tapping noise on 2016, long after shut off

Discussion in '5th Gen 4Runners (2010+)' started by Texas, Jan 27, 2017.

  1. Jan 27, 2017 at 1:27 AM
    #1
    Texas

    Texas [OP] New Member

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    Purchased my second 4runner last July, 2016, SR5 and I have ongoing issue with a noise. I go out into my garage and this happens hours since I've shut the engine off I hear a tapping noise. Tonight I just opened one of the doors to see if I could hear it better and then it stopped. But I have heard this before, I thought it was my hot water heater in the garage, but it is the car. It is a very faint tapping noise underneath the car and I had parked it about 6 hours prior, thanks for any ideas
     
  2. Jan 27, 2017 at 6:46 AM
    #2
    moneypit

    moneypit New Member

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    Other forums have found that it is part of the EVAP system for removing fumes from the gas tank. It usually occurs after shut down and is nothing to worry about.
     
    mndart, Rebelchurch and Relentless like this.
  3. Jan 27, 2017 at 8:56 AM
    #3
    brochacho

    brochacho New Member

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    freaked me out the first time I heard it too.
     
  4. Jan 28, 2017 at 8:05 PM
    #4
    Texas

    Texas [OP] New Member

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    Thanks very much, I will ignore it then
     
  5. Nov 15, 2017 at 8:57 AM
    #5
    OvrlandNoob

    OvrlandNoob New Member

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    Really annoying when you are sleeping in the 4runner. Discovered it this weekend when on a camping trip. Goes on 5 hours after shut off and continues for about 10 + minutes. Started the engine and it didn't go back on during the night.
     
  6. Nov 15, 2017 at 6:08 PM
    #6
    Palerider

    Palerider New Member

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    Installed Rago brackets and 4" cube ditch lights. Weather tech mats. Cargo net. Cargo mat. Ordered Gobi rack with ladder.
    You may have a gremlin in there
     
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  7. Nov 25, 2017 at 5:45 AM
    #7
    j cat

    j cat New Member

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    this is part of the fuel evap leak check program ... after the vehicle sits for several hours the PCM does the LEAK test ... this does not do anything but check for a leak in the fuel vapor system....
    possible it could be programmed to do the check much sooner ..
     
    mndart likes this.
  8. Nov 25, 2017 at 6:28 AM
    #8
    Vintage

    Vintage New Member

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    Always wondered about that noise. Both 15 and 17 4Runners did it, so figuared it was normal. Thanks for the update.
     
  9. Nov 25, 2017 at 11:28 AM
    #9
    j cat

    j cat New Member

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    IT doesn't remove gas vapors from gas tank LOL.....very odd ...
     
  10. Nov 25, 2017 at 1:07 PM
    #10
    Vintage

    Vintage New Member

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    Any Idea what the noise is?
     
  11. Nov 25, 2017 at 3:09 PM
    #11
    j cat

    j cat New Member

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    spacer lift front 1inch
    this is part of the fuel evap leak check program ... after the vehicle sits for several hours the PCM does the LEAK test ... this does not do anything but check for a leak in the fuel vapor system....
    possible it could be programmed to do the check much sooner ..

    just saying there will always be gas vapors in the fuel tank !

    Toyota does this when shutdown ..GM does this when vehicle is running .. in the fuel tank is a pressure sensor as vacuum is applied to the fuel vapor system the pressure sensor reports how the pressure/vacuum changes if its out of the programmed software parameters, then a code will throw..
     
  12. Nov 26, 2017 at 4:29 AM
    #12
    Vintage

    Vintage New Member

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    Thank you for explaining.
     
  13. Jan 6, 2018 at 7:20 PM
    #13
    mndart

    mndart New Member

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    Yay!! :bowdown:
    The 4Runners forum made me look like a real smart feller. My wife heard this noise tonight, I heard it a couple of nights ago. I was able to tell her what this was.
    :transformer::llama::jellydance::kona::locked::dancingbroccoli::militarypress::benchpress::muscleflexing::headbang:
     
    OvrlandNoob and Riding Dirty like this.

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