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06-14-2005, 10:45 AM
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#1
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Member
Join Date: Aug 2004
Posts: 96
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I have a P32 chassis and one of the exhaust pipes has almost no soot inside and one is fairly black. It runs just fine with no sign of one bank misfiring. I'm wondering if one cat converter is just doing a better job than the other. Just a curious question for one of you engine experts.
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06-14-2005, 10:45 AM
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#2
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Member
Join Date: Aug 2004
Posts: 96
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I have a P32 chassis and one of the exhaust pipes has almost no soot inside and one is fairly black. It runs just fine with no sign of one bank misfiring. I'm wondering if one cat converter is just doing a better job than the other. Just a curious question for one of you engine experts.
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06-15-2005, 05:54 AM
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#3
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Community Moderator
Fleetwood Owners Club Freightliner Owners Club Florida Cooters Club
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 9,581
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The catalytic converter removes NOx-based pollutants, not soot. Sounds to me as though one bank of cylinders is not getting the right air-fuel mixture. Wonder if the engine has separate oxygen sensors for each side and one os not working right?
What engine is in your P32? 454 or 8.1L? What year?
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Gary Brinck
2004 American Tradition; 2007 GMC Acadia
Homebase in the Ocala Nat'l Forest near Ocala, FL
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06-16-2005, 03:56 AM
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#4
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Member
Join Date: Aug 2004
Posts: 96
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RV Roamer,
You may have the answer. Anyway, it's a 2004 8.1L with about 9000 miles. I'll bet there are two oxygen sensors, one just ahead of each cat converter. I'll crawl under and look. For reference, my 2003 Ford F150 with 37,000 miles has such a clean tailpipe that if you wipe the inside of it with your finger, you get a little white powder.
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06-16-2005, 04:23 AM
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#5
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Senior Member
Join Date: Nov 2002
Location: Crossville, TN USA
Posts: 909
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Both of my exhaust run black. Have had system checked several times. There are other owners with the same problem. Seams to be the nature of the beast.
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Tom & Bonnie
2008 Winnebago Aspect 29H
A Class C Not a B+
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06-16-2005, 02:53 PM
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#6
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Senior Member
Join Date: Apr 2003
Location: Burlington,Ontario,Canada
Posts: 123
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My two exhaust pipes are also black. I have been told that this is quite normal.
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2006 Itasca Suncruiser 38T
W24 Chassis.
2003 Toyota Corrola
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06-19-2005, 02:48 PM
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#7
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Community Moderator
Winnebago Owners Club Freightliner Owners Club
Join Date: Dec 2003
Location: Weyauwega, WI US
Posts: 2,868
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My left one also has a little black around the inside of the pipe.
Don
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Don & Bev Morgan Weyauwega WI, 05 Itasca Horizon 40KD, 400 HP Cummins, Delorme GPS LT 40, Toad 07 Saturn Vue AWD, Air Force One, Mayor of Weyauwega, Waupaca Co Board Supervisor
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08-06-2005, 03:43 PM
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#8
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Member
Join Date: Jul 2005
Posts: 35
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Both of mine are black too...Hope thats a good thing!
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03 Winnebago Adventurer 37C
8.1 litre
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08-07-2005, 03:22 AM
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#9
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Registered User
Join Date: Jun 2005
Posts: 1,567
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Art, mine look just like yours....it's fine...
Mark
2005 Sightseer 30b, Workhorse P-32 with standard rear StabilRide suspension, IFS
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