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Thread: Plugged Cat???

  1. #1

    Default Plugged Cat???

    So what would be the easiest way to test if my cat is plugged up?

  2. #2


    What is happening that makes you think it's bad or clogged?

    The way I tested the one on my old truck is removing the O2 sensor to see if the idle and RPMs improved. The only other things I can think of doing is taking it off, or replacing it.

    2008 Ext. Cab Silverado LT1 5.3L 2WD
    APC LED Tail Lights | Spec D Smoked Third LED Brake Light | aFe Magnum Force Stage 2 CAI

  3. #3


    Just unbolt the front connector and if your truck runs better with it disconnected , I would replace the Cat
    2010 Chevy Silverado Z71 ext cab.4x4
    72 Monte Carlo 350-415 hp- sold (June 2011) to pay medical bills
    79 Impala 350 4bbl 375 hp- sold (June 2011)to pay medical bills

    "If He asks you to go a mile go two"

  4. #4
    Sr. Apprentice
    Join Date
    Jan 2012
    Sault Ste. Marie, Ontario Canada


    A foul rotten egg smell in the exhaust is also an indicator that the cat is plugged/failing. Sulfur/sulfides give off a rotten egg smell.
    My lug nuts require more torque than your Honda makes.

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