03-10-2007, 12:31 PM
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#1
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AF Newbie
Join Date: Jan 2007
Location: Silverthorne, Colorado
Posts: 2
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Catalytic converter
My Rodeo has been throwing the P0420 code for a long time. Usually I turn the CEL off and it stays off for a while. Now gas mileage has become an issue. I think it may be time for a new cat, any thoughts? Should I try the O2 sensor first, or just go after the cat? My 96 is a manual transmission, with a single cat on the drivers side. While I am not looking forward to replacing this, I have had the cat assembly off recently to replace the starter, so I am aware of what is in front of me.
If anybody has any thoughts on a good (read less $) replacement cat, let me know. I can do a bolt on, or weld on, or even the entire assembly if that makes sense.
Thanks for any help.
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2005 BMW 325xi <27K , still under warranty and lettin' BMW take of care of it until 12/08
1995 GMC 2500 6.5L Turbo Diesel * Ext. Cab * Vin "S" * 4L80-E with Tru-Cool M7B cooler * 3.73 * 97,500 miles * Nokian Vatiiva LT265/75R16 * Rotella T 15w-40 * Wolverine Engine Heater * 97+ air filter * ISSPRO Boost/EGT/Tranny Temp * Gutted Upper Intake * 4" Pinnacle Turbo Back Exhaust 
1996 Isuzu Rodeo 3.2L V6 SOHC * 170,000* Bridgestone Alenza P245/70R16 * Rotella T 15w-40 *
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03-10-2007, 03:44 PM
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#2
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AF Enthusiast
Join Date: Apr 2004
Location: Unknown
Posts: 2,679
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Re: Catalytic converter
Hey, kind of off the subject, noticed that you run 15w-40 in your Rodeo; notice any difference on power?
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03-10-2007, 05:19 PM
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#3
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AF Newbie
Join Date: Jan 2007
Location: Silverthorne, Colorado
Posts: 2
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Re: Catalytic converter
I have not noticed any increase in power, but it seems to consume less oil. Even if it does not make any difference in anything, it is great oil.
__________________
2005 BMW 325xi <27K , still under warranty and lettin' BMW take of care of it until 12/08
1995 GMC 2500 6.5L Turbo Diesel * Ext. Cab * Vin "S" * 4L80-E with Tru-Cool M7B cooler * 3.73 * 97,500 miles * Nokian Vatiiva LT265/75R16 * Rotella T 15w-40 * Wolverine Engine Heater * 97+ air filter * ISSPRO Boost/EGT/Tranny Temp * Gutted Upper Intake * 4" Pinnacle Turbo Back Exhaust
1996 Isuzu Rodeo 3.2L V6 SOHC * 170,000* Bridgestone Alenza P245/70R16 * Rotella T 15w-40 *
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03-10-2007, 06:21 PM
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#4
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AF Enthusiast
Join Date: Apr 2004
Location: Unknown
Posts: 2,679
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Re: Catalytic converter
Yeah, you definitely will not see an *increase* in power; was wondering actually if you've noticed a *decrease* in power?
I run Maxlife 10w-30 and currently have 170k miles; must be one of the lucky owners, mine only uses maybe 1/8qt every 3k miles or so.
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