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Thread: Need Help Diagnosing Problem

  1. #16
    Join Date
    Jan 2014
    Location
    Maricopa
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    1,359

    Re: Need Help Diagnosing Problem

    Quote Originally Posted by OlneyJeeps View Post
    My vote is clogged cat.
    Loosen bolts at cat input, creating a leak and eliminating back pressure. If cat was clogged, it should run better. This is for diagnosis only. You would probably get O2 sensor code doing this.
    Front cats or rear cat? 05 has 3, which I already knew and have located on vehicle but appreciate all guidance and help being offered!

    Sent from my SM-G950U using Tapatalk

  2. #17
    Join Date
    Jan 2014
    Location
    Goodyear
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    1,063

    Re: Need Help Diagnosing Problem

    Happened to me years back. All off a sudden it was bogged down and drove 10mph all the way home. Bad cat

  3. #18
    Join Date
    Dec 2003
    Location
    North Phoenix
    Posts
    8,348

    Re: Need Help Diagnosing Problem

    Quote Originally Posted by greyst View Post
    Front cats or rear cat? 05 has 3, which I already knew and have located on vehicle but appreciate all guidance and help being offered!

    Sent from my SM-G950U using Tapatalk
    If there is a flange you can disconnect in front of the third Kat, I would start there, see if there's a difference. If no difference, reconnect then loosen connections on the other cats independently so you can test independently. If all else fails, loosen connection before both cats and see if it works. You might just have to replace all three. If you want to be real cheap, and the cats have not come apart, you can take them out and wash them with muriatic acid. Many times when they go bad it is because the ceramic is broken, so you will hear the classic marbles in the tailpipe sound. If it is broken you just need to replace.
    Quote Originally Posted by amber.hodge View Post
    Steve is so innocent. Its really cute, actually. Ah to be a kid again....
    "anyone who says they know everything about anything is either a fool or a liar"

  4. #19
    Join Date
    Jan 2012
    Location
    Buckeye, Az.
    Posts
    7,765

    Re: Need Help Diagnosing Problem

    I cannot locate that cat I thought I had. Sorry.
    Non-College Educated Working Class White Deplorable....

  5. #20
    Join Date
    Dec 2003
    Location
    North Phoenix
    Posts
    8,348

    Re: Need Help Diagnosing Problem

    Quote Originally Posted by amber.hodge View Post
    Steve is so innocent. Its really cute, actually. Ah to be a kid again....
    "anyone who says they know everything about anything is either a fool or a liar"

  6. #21
    Join Date
    Dec 2003
    Location
    North Phoenix
    Posts
    8,348

    Re: Need Help Diagnosing Problem

    Quote Originally Posted by OTR-93YJ View Post
    I cannot locate that cat I thought I had. Sorry.
    Did you check the pound?
    Quote Originally Posted by amber.hodge View Post
    Steve is so innocent. Its really cute, actually. Ah to be a kid again....
    "anyone who says they know everything about anything is either a fool or a liar"

  7. #22
    Join Date
    Dec 2003
    Location
    North Phoenix
    Posts
    8,348

    Re: Need Help Diagnosing Problem

    Another test you can do is with an infrared scanner purchased from Home Depot for about $20. After driving the jeep around the block a couple times to warm it up, take temperatures at the inlet and the outlet of each cat. Outlet should be 50 2 100 degrees hotter than the input. The important thing to look for is that the output is hotter than the input. If it is not, the cat is not working.

    Another key indicator is when you have the marbles in exhaust sound which indicates that the ceramic Has Broken
    Quote Originally Posted by amber.hodge View Post
    Steve is so innocent. Its really cute, actually. Ah to be a kid again....
    "anyone who says they know everything about anything is either a fool or a liar"

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