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Prius bin bag sound

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by iron-icman, Jul 3, 2024.

  1. iron-icman

    iron-icman Member

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    Hi guys just recently noticed a bin bag sound flapping in the wind when I put my accelerator down. At low speeds this didn’t do it. I have read about and some people think maybe cat I did have one put on about 3 years ago as mine was stolen. Any other ideas or easy ways to test this.
    Thank you

    my car has 145,000 miles
     
    #1 iron-icman, Jul 3, 2024
  2. pasadena_commut

    pasadena_commut Senior Member

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    Plastic shopping bag? Have you looked under the car? It could be stuck anywhere on the bottom of the car, worse though if it is covering part of the radiator. On a different car we owned one melted onto the catalytic converter and the car smelled like a burning candle for a month.
     
    #2 pasadena_commut, Jul 3, 2024
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  3. iron-icman

    iron-icman Member

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    Yes I looked and had it on a ramp it only makes the sound when I press hard on accelerator
     
    #3 iron-icman, Jul 4, 2024
  4. maleko

    maleko Member

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    Sorry, I should have just replied to your new thread here... Unable to delete my reply in the other thread.

    It could be exhaust leaking out around your header/downpipe steel/ceramic donut where the catalytic connects due to a clogged catalytic creating too much backpressure and resistance to flow.

    How is your performance / top end right now? Are you struggling to hit 85-90+mph on the highway with the gas pedal to the floor?

    If it's like mine was it will start doing it more frequently and at lower rpm's yielding lower power output and more strange noises as the catalytic gets more clogged.

    I ended up taking my cat off and scraping / pressure washing it to open it back up again.

    Before:
    1224231802b_HDR.jpg

    After:
    1227231933b_HDR.jpg
     
    #4 maleko, Jul 4, 2024
    Last edited: Jul 4, 2024
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  5. pasadena_commut

    pasadena_commut Senior Member

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    This probably isn't it, but it is easy, so ...

    Check that the air filter is the correct type, is seated correctly, that the cover lid is fully locked down and the box itself is firmly in place. The most immediate result of stepping on the accelerator is that the throttle opens and the flow through all of that increases. if something is loose it could move around and it might produce the sound you hear. As long as you are in that neighborhood, check the air path upstream of the air filter.

    Does it make the sound when you step on the gas and the car is in neutral? If so you can listen from the outside while somebody else steps on the gas.
     
    #5 pasadena_commut, Jul 4, 2024
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  6. iron-icman

    iron-icman Member

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    Hi all, took it to a garage who have replaced the catalytic converter which has solved the issue. It was rattling and they think the faster I’m going it making more air rattle and not get through if h fast enough. Thank you all for your help. Is there also something I can do myself easy ie clean the egr valve/pipe now I have a new cat I don’t want to push any rubbish through again clogging it. Does anyone have any step by steps for doing this. Thank you
     
    #6 iron-icman, Jul 11, 2024 at 6:00 PM
  7. bisco

    bisco cookie crumbler

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    #7 bisco, Jul 11, 2024 at 8:51 PM
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  8. mr_guy_mann

    mr_guy_mann Senior Member

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    Since you are posting in the Gen2 forums, I assume you have a 2004-2009 Prius, which doesn't have EGR.

    As far as keeping the cat healthy- no engine misfires, no oil burning, and good fuel trims.

    Posted via the PriusChat mobile app.
     
    #8 mr_guy_mann, Jul 11, 2024 at 9:43 PM
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  9. pasadena_commut

    pasadena_commut Senior Member

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    Not an expression I use much, but this guy is a hoot.
     
    #9 pasadena_commut, Jul 12, 2024 at 1:27 AM
  10. iron-icman

    iron-icman Member

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    Oh right I didn’t realise I thought it did
     
    #10 iron-icman, Jul 12, 2024 at 3:14 AM
  11. iron-icman

    iron-icman Member

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    This code came on this morning, I did see it before but other said it wasn’t anything to worry about, I’m guessing this was my warning before it failed. The code came on again today P0420 so I have just cleared it as I have brand new cat and back box
     
    #11 iron-icman, Jul 12, 2024 at 3:17 AM
  12. iron-icman

    iron-icman Member

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    Will give this a watch thanks
     
    #12 iron-icman, Jul 12, 2024 at 3:18 AM
  13. dolj

    dolj Senior Member

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    @iron-icman

    @bisco, agreed he makes an informative and entertaining video. Still, it makes me glad I do not own a Gen 3.
     
    #13 dolj, Jul 12, 2024 at 9:29 AM
  14. bisco

    bisco cookie crumbler

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    and why i dumped mine
     
    #14 bisco, Jul 12, 2024 at 1:27 PM
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