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Need advice. Catalytic Converter Problem...

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Old 12-21-2010 | 05:43 PM
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Darrien's Avatar
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Angry Need advice. Catalytic Converter Problem...

First post, hope you guys can give me a suggestion or two.

My CEL light came on, took it to the dealership where they said it was a PO420 Cat Converter malfunction, of course I'm at 83,000 miles which is past the 80,000 emission warranty.
They are quoting me $1,700 for the part.


My question is, where can I find a cat converter that isn't outrageously overpriced?

Also, how long can I drive it until the car starts losing power? Currently, it's fine.
I reset the CEL light by disconnecting the battery, only a matter or time till it comes back on.
Old 12-21-2010 | 05:58 PM
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From: Dirty Jerz
People have CATs for sale in the FS section. Take a look there before you run into more problems
Old 12-21-2010 | 06:12 PM
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or get an RP supercat for $400 bucks to pass emissions.
Old 12-21-2010 | 06:38 PM
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What were the conditions just before the P0420?

I ask because I was on the highway at high speed (80+ MPH) for a couple of hours, stopped for gas, Got a P0420 a while later on the same drive.
Once I cleared it it never came back. I inspected the cat and it's fine. It also passed the drive clean test.

That was about 5K ago
Old 12-21-2010 | 06:42 PM
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Originally Posted by bulletproof21
or get an RP supercat for $400 bucks to pass emissions.
Took the words out of my mouth!
Old 12-21-2010 | 06:45 PM
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Originally Posted by DarkBrew
What were the conditions just before the P0420?

I ask because I was on the highway at high speed (80+ MPH) for a couple of hours, stopped for gas, Got a P0420 a while later on the same drive.
Once I cleared it it never came back. I inspected the cat and it's fine. It also passed the drive clean test.

That was about 5K ago

Pretty much the same story...driving on the highway.
At first, I checked the gas cap, it didn't seem loose but I tightened it up anyway the next day the light was off.
Obviously just a weird coincidence?

Fast forward a few weeks and it came on again while driving on the highway.

I haven't had any issue with power, only thing I've noticed is that's been idling a little harder than usual.
Old 12-21-2010 | 08:45 PM
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yeah our cats are stoopid expensive.
just saw this one: https://www.rx8club.com/rx-8-parts-sale-wanted-44/stock-catalytic-converter-209160/
or, go with the RP like bulletproof21 suggested...
Old 12-21-2010 | 08:57 PM
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no, RP Supercat's fail , get BHR's midpipe with a Davesport hi flow cat... best of both worlds...
Old 12-21-2010 | 09:02 PM
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The emission test would really depend on where the OP lives.
Old 12-21-2010 | 11:18 PM
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Originally Posted by WTBRotary!
no, RP Supercat's fail , get BHR's midpipe with a Davesport hi flow cat... best of both worlds...
What HP can a mid-pipe buy you? I see them starting at about $200....
Old 12-22-2010 | 01:46 AM
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From: Dirty Jerz
I would have also suggested a Mid Pipe, but the OP seems t6 have his heart set on a Stock Kitty.

However, I would go with a Mid pipe in your situation, save some coin.
It's a simple fix once you make your decision. 83K, that stinks to be right out of warranty when costly, yet simple fixes decide to pop up.
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