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Catalytic converters fried?????

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Old May 25, 2006 | 11:48 PM
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Big Red Machine Z06's Avatar
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Default Catalytic converters fried?????

Just a thought, my car, a '02 Z06 w/ tpis headers, fast 78mm intake, x-pipe w/ high flow cats, PRT mufflers & cold air kit.

I tuned and dynoed 392rwhp sae corrected last summer.

A bone stock Z runs right beside me on the highway.:screwy:

Whenever I go for a good spirited run ( ex. a 1/4 mile pass), I hear a tapping jingling noise coming from under the car when I hit any small bumps in the road. This rattling will usually last for about 30 sec. to 1 min. and go away. I have had the car up in the air and checked for anything obviously loose etc.

Now my buddy who owned the car previously , had run for about a year and a half with "experimental tuning" trying to get it dialed in(without a wideband or dyno)

Could this sound be the catalytic converters solidifing when they get hot, and maybe the power loss ???

Last time the x-pipe was off the cats had the full of rocks sound.

Any input is appreciated.. Thank you.
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Old May 28, 2006 | 01:53 AM
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Slap some new cats on there and if the noise persists then you'll know that's not your problem
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Old May 28, 2006 | 03:15 AM
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take a bat to those bitchs lol
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Old May 28, 2006 | 03:17 AM
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The cats sounded like they had **** moving around when the xpipe was off? They should make zero noise if you shake them.
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Old May 28, 2006 | 11:23 AM
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Originally Posted by taintedmeat
The cats sounded like they had **** moving around when the xpipe was off? They should make zero noise if you shake them.
My Jeep did that. It rattled like crazy and sounded like the lower end of the motor took a crap. I took the cat off and found that the block of catalyst was loose inside. I ram-rodded that sucker and put it back on hollow.
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