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Old April 10th, 2007, 01:15 PM   #1
xc600
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Default Catalytic converter

If someone, who will remain nameless, was to have a 97 TJ 4.0L that had one heck of a rattle coming from something that looked like the catalytic converter, and he was to want to bust up and get rid of said rattle would there be an easier way that it could be done.......hypothetically of course??
Seems to me, I once knew a guy that did it with a long screwdriver and a hammer, or a piece of re-bar.......does anyone know if that might still be the way it would be done......hypothetically of course?

And before the "greenies" come down on my "hypothetic" friend for even thinking about doing something as "awful" as that, please be aware that he's done lab level vehicle emission testing and knows exactly how a catalytic converter is supposed to work and what they're for.......

Thanks in advance for the help.
Alan
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Old April 10th, 2007, 01:18 PM   #2
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Yes, if your were testing for restriction in the exhaust and hollowed out the cat converter that would be the path of least resistance. However, be sure to remove the downstream O2 sensor during the removal, and reinstall when you start your test.
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Old April 10th, 2007, 08:28 PM   #3
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There will be a code set be the ECM. It will see the cat is completly dead. And the check engine light will come on.. The downstream O2 is used by the ECM, to check the cat.
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Old April 10th, 2007, 08:35 PM   #4
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You arent getting enough power out of gutting a cat to bother. Not to mention the whole emissions thing you should be thinking of if you like to wheel and enloy the beutiful outdoors and shit. Spend 50 bucks on a high flow cat already..fukhed..lol
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Old April 10th, 2007, 08:38 PM   #5
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i had the same thing happen to my 98 dodge.so i just torched the side open and removed the guts. and welded it back shut..as for the error codes i havent had any problems with em
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Old April 10th, 2007, 08:44 PM   #6
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Quote:
Originally Posted by Xrated View Post
You arent getting enough power out of gutting a cat to bother.
i beleive it was a rattle prob. not a performance prob
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Old April 10th, 2007, 08:48 PM   #7
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Quote:
Originally Posted by elmo View Post
There will be a code set be the ECM. It will see the cat is completly dead. And the check engine light will come on.. The downstream O2 is used by the ECM, to check the cat.

Not necessarily. Some afterburn happens in the exhaust system and it may be enough to make the system think it's working properly. A hole in the exhaust upstream from the post cat O2 sensor sometimes cures it.
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Old April 10th, 2007, 08:49 PM   #8
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Hey Xrated you must read as well as you write and spell!!!

If you read the very first post you'll notice that this came about from a loose brick in a cat making noise. Now follow me smartguy......closely.....obviously if the cat is making noise then it's not working 100% anyway, and more than likely the brick isn't even in the correct location any more....GOT IT????

No-where is MORE POWER even mentioned....although I realize to some people that's all that matters. Especially those of you that still swing clubs, right caveman, I mean Xrated.....

Just for the record, I did pull my exhaust off tonight and there was a brick banging around in there, that I did remove, only because it was sideways to the exhaust flow. I think I lucked out however and the front brick still looks good and I left it there.

Hope that's fine with Xrated.....
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Old April 10th, 2007, 08:54 PM   #9
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:dunie: wow
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