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Possible cat failure at 40K

Discussion in '3rd Gen. Tacomas (2016-2023)' started by Bascoma, Feb 29, 2020.

  1. Feb 29, 2020 at 11:00 AM
    #1
    Bascoma

    Bascoma [OP] I smell dog poop.....

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    I suspect a possible clogged cat on my 17 OR Manual with 41,000 miles. Otw home from the gym I noticed I had a huge reduction in power out of no where. 65mph in sixth gear, if I floor it, it will not accelerate at all. The engine would scream, a hissing noise is coming from the passenger side very noticeable like in the door/floor area. No CEL or any dash lights. Limped home. In the driveway while in neutral just flooring the gas it still has the very loud hissing. No visible exhaust leaks and no noise until you get on it. I suspect the secondary passenger side cat is shot. Dealership will take it in on Monday. I suspect that will be the usual mess. Anyway, I will keep you all posted.
     
  2. Feb 29, 2020 at 11:04 AM
    #2
    koditten

    koditten Well-Known Member

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    Any odd smells? Are you sure you haven't glazed the clutch?
     
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  3. Feb 29, 2020 at 11:05 AM
    #3
    Bascoma

    Bascoma [OP] I smell dog poop.....

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    I considered that. Clutch engages fine. Put in first, let out clutch, catches and drives. Put in 4th let out clutch, stalls like it should. Also, the symptoms are all there while sitting still in neutral, without the forward motion of course. I don’t notice any smells but I am also stuffed up.
     
  4. Feb 29, 2020 at 11:07 AM
    #4
    auskip07

    auskip07 Well-Known Member

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    Hissing noise..... Like your high pressure fuel pump has gone bad
     
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  5. Feb 29, 2020 at 11:08 AM
    #5
    koditten

    koditten Well-Known Member

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    Any check engine lights? Smog pump is the only thing that could make that noise.
     
  6. Feb 29, 2020 at 11:09 AM
    #6
    Bascoma

    Bascoma [OP] I smell dog poop.....

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    No CEL.
     
  7. Feb 29, 2020 at 11:11 AM
    #7
    Bascoma

    Bascoma [OP] I smell dog poop.....

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    If I’m correct the high pressure pump is in or near the tank. This sound is obviously coming from the passenger side cat under load. Outside of the truck with someone else flooring it you can hear it scream. Like it is bottled up but enough exhaust pressure shoved in will force a hole and make it through.
     
  8. Feb 29, 2020 at 11:23 AM
    #8
    TacoMamba35

    TacoMamba35 Well-Known Member

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    High pressure fuel pump is in the engine.
     
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  9. Feb 29, 2020 at 11:26 AM
    #9
    Bascoma

    Bascoma [OP] I smell dog poop.....

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    Good to know! Maybe that is the cause then. I look forward to finding out.
     
  10. Feb 29, 2020 at 11:30 AM
    #10
    Bascoma

    Bascoma [OP] I smell dog poop.....

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    Ah. This thing. I’ll play with it.

    E0BD5901-8232-4E9A-AFCA-D135CE0E4DD4.jpg
     
  11. Feb 29, 2020 at 11:35 AM
    #11
    splitbolt

    splitbolt Voodoo Witch Doctor

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  12. Feb 29, 2020 at 2:29 PM
    #12
    basshole

    basshole Well-Known Member

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    Your symptoms definitely sound like a clogged cat. If you have a temp gun point it around sections of the cats and compare inlet/outlet to both banks.
     
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  13. Feb 29, 2020 at 2:31 PM
    #13
    dabbinuguay

    dabbinuguay Well-Known Member

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    Sorry...
    [​IMG]
     
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  14. Feb 29, 2020 at 3:04 PM
    #14
    Chew

    Chew Not so well known user

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    Doubtful your truck has run shitty enough to clog a cat with no CELs over time.
    Use a temp gun to take inlet and outlet temps, a clogged cat will have a large difference in temps, as the hot exhaust gases cannot flow through.
     
    Last edited: Feb 29, 2020
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  15. Feb 29, 2020 at 4:30 PM
    #15
    Smashing

    Smashing Well-Known Member

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    Should it be the cat they're under warranty till 80k
     
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  16. Mar 1, 2020 at 1:12 AM
    #16
    AKGSD

    AKGSD Warranty denied

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    I believe by government standards it’s 8 years/100k? Used to be on ‘merican brands anyway
     
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  17. Mar 1, 2020 at 4:04 AM
    #17
    Smashing

    Smashing Well-Known Member

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    Screenshot_20200301-070356_Google.jpg
     
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  18. Mar 1, 2020 at 4:08 AM
    #18
    TRD Ted

    TRD Ted Well-Known Member

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    Silly question but did you climb underneath to check and see if it was actually still there? Not sure what type of area you live in but where I’m from they have been getting stolen like crazy....
     
  19. Mar 1, 2020 at 4:43 AM
    #19
    Da Voke

    Da Voke Well-Known Member

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    Umm.... wouldn’t that have been rather loud and evident?
     
  20. Mar 1, 2020 at 6:11 AM
    #20
    Tacman19

    Tacman19 Well-Known Member

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    As many as I can fabricate
    I can't imagine no CEL if a CAT went bad. That downstream O2 sensor would be going crazy so I'm going to guess fuel. Fuel is really not monitored by the ECU. Yeah it reads rich/lean, injector pulse crap but plug in a scanner and find the fuel pressure? (a scanner the common guy can afford) Lol. You may have fuel delivery, but do you have enough at the correct PSI..Just a guess. Put me in for $1.00 for the pool. Lol
    Zim
     
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