Plugged Cat???

Discussion in 'Chevy C/K Truck Forum' started by SGSelby, Jan 28, 2012.

  1. SGSelby

    SGSelby New Member

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

    Untouchable Member 2 Years 100 Posts

    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.
  3. Coach24

    Coach24 Rockstar 3 Years 5000 Posts

    Just unbolt the front connector and if your truck runs better with it disconnected , I would replace the Cat
  4. Strino78

    Strino78 Member

    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.

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