Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 09-19-2016, 06:24 PM   #1
Junior Member
 
Join Date: Sep 2016
Posts: 2
Catalytic converters?

I'm trying to figure out what could have happened to my catalytic converter. We have a 2004 Sea Breeze LX with under 37000 miles, since last January we have been trying to Pass California emissions test. This was its first failure since new, the first time we thought it was because it had sat for almost three months, so we took it for a camp out (300 mi.) trip and it failed again. New O2 sensors (Non OEM) failed worse. I returned them and ordered OEM O2 sensors, failed still. replaced MAF sensor check everything, ECM and its wiring. Did find and fixed a exhaust leak. OBD II has never shown a code, graf. for O2 sensors bank 1 was off but fixed after exhaust leak repair. Still failed.
Today I took off both catalytic assemblies and found to my surprise one cat I can see and it looks OK to me, and it is the one that showed a bad O2 sensor. The other one seems to be missing? I can see straight through the whole pipe.
We did have a front tire blow out on that same side last year while on the freeway, I don't know if it was hit by anything then.
Any guesses on what could of happened to it?
__________________

__________________
billsimi is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-19-2016, 07:12 PM   #2
Senior Member
 
BFlinn181's Avatar


 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 14,744


I once drove a university fleet 15 passenger van that lost power 1400 miles from campus. Went to a garage and the catalytic converter was completely blocked. The honeycomb had broken into pieces that tumbled in the exhaust gases flow and had been turned into small nuggets of honeycomb. Perhaps yours did the same, reducing the size of the interior pieces until they got blown on down the exhaust pipe. In my case, the licensed mechanic took a 'lunch break' while I shook and rattled all the pieces out of the converter, then I reinstalled it and drove it until I got back to the campus garage.

You will obviously have to replace the converter, but I'd also check that the contents of the catalytic converter haven't blocked the muffler downstream from the converter.
__________________

__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 09-19-2016, 10:00 PM   #3
Senior Member
 
2 Stroker's Avatar
 
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 1,565
We have a 98 Honda Accord and the catalytic converter according to my scan tool needed to be replaced, every 100 or so miles I would turn off the light on the dash through the OBD2 port.
Now the believe it or not part. The wife seen a you tube on catalytic converter cleaning, they never ware out just get sick as long as you can see through the honeycombs the cat just needs to be cleaned and Honda wanted $1700 for a new one.
All I did was pull it off and get a bucket of water and 2 to 4 oz of laundry detergent (liquid) and suds it up. Left it in one day pulled and put the other end in for a day moving it up and down just like your washing clothes. On the third day pulled it and rinsed it with clean water, set in the sun all day to dry. Reinstalled and that was 2 years ago still no codes

2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
2 Stroker is offline   Reply With Quote
Old 09-19-2016, 10:09 PM   #4
Senior Member
 
BFlinn181's Avatar


 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 14,744
Quote:
Originally Posted by 2 Stroker View Post
We have a 98 Honda Accord and the catalytic converter according to my scan tool needed to be replaced, every 100 or so miles I would turn off the light on the dash through the OBD2 port.
Now the believe it or not part. The wife seen a you tube on catalytic converter cleaning, they never ware out just get sick as long as you can see through the honeycombs the cat just needs to be cleaned and Honda wanted $1700 for a new one.
All I did was pull it off and get a bucket of water and 2 to 4 oz of laundry detergent (liquid) and suds it up. Left it in one day pulled and put the other end in for a day moving it up and down just like your washing clothes. On the third day pulled it and rinsed it with clean water, set in the sun all day to dry. Reinstalled and that was 2 years ago still no codes

2 stroker
Nice story and clever solution, but the OP's catalytic converter is empty of the honeycomb grids, all the soaking in the world won't restore the interior of the converter.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 09-19-2016, 11:43 PM   #5
Senior Member
 
2 Stroker's Avatar
 
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 1,565
Bob
You are right. I missed that part. My mind was somewhere else.
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
2 Stroker is offline   Reply With Quote
Old 09-20-2016, 06:18 AM   #6
Senior Member
 
Workhorse Chassis Owner
Join Date: Sep 2007
Location: st.charles mo.
Posts: 1,161
Any thing hitting the cat. can crack the material inside and evetualy it will fall apart and be blown out by the exhaust. The problem is where did it go. It ends up in the muffler and restricts the flow so you have to remove the muffler and try to clean it out or replace it also.
__________________
speed racer is offline   Reply With Quote
Old 09-20-2016, 06:35 AM   #7
Community Administrator
 
JohnRR's Avatar


 
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Sep 2010
Location: Marquette, Michigan "Da UP"
Posts: 16,559
Running without the cats will cause a distinct drop in low end power and fuel mileage, I found that out the hard way.

The fuel mileage problem may have been the fact it would continually down gear for the slightest hint of a uphill incline.
__________________
John & Cathy R.
06 Pace Arrow 38L W24
08 Lincoln MKX AWD
See My RV Upgrades
JohnRR is offline   Reply With Quote
Old 09-20-2016, 09:24 AM   #8
Senior Member
 
BFlinn181's Avatar


 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 14,744
Quote:
Originally Posted by JohnRR View Post
Running without the cats will cause a distinct drop in low end power and fuel mileage, I found that out the hard way.

The fuel mileage problem may have been the fact it would continually down gear for the slightest hint of a uphill incline.
Since the catalytic converter only chemically changes the composition of the exhaust gases, I'm curious as how it "will cause a distinct drop in low end power and fuel mileage"? When the engine lost all power above idle speed and had no power, I knew the exhaust was blocked and discovered the converter had disintegrated and blocked exhaust flow. Removing the catalytic converter would increase exhaust gas flow, but I don't understand how it would cause the issue you report. Perhaps a sensor downstream of the converter changed the ECU's air/fuel mix or timing?
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 09-20-2016, 09:38 AM   #9
Senior Member
 
F4Gary's Avatar
 
Join Date: Feb 2015
Location: Grapevine, Tx
Posts: 773
So is Kalifornia using a tailpipe sniffer or just the OBD port? Is there an O2 sensor after the cats?

Ford? Chevy? Try posting in your chassis forum.

As has been said, the contents of your cat are now clogging your muffler.
__________________
2004 Fleetwood Southwind 32VS W20
ReadyBrute Elite towing an '07 CRV
F4Gary is offline   Reply With Quote
Old 09-21-2016, 07:52 AM   #10
Community Administrator
 
JohnRR's Avatar


 
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Sep 2010
Location: Marquette, Michigan "Da UP"
Posts: 16,559
Quote:
Originally Posted by BFlinn181 View Post
Since the catalytic converter only chemically changes the composition of the exhaust gases, I'm curious as how it "will cause a distinct drop in low end power and fuel mileage"? When the engine lost all power above idle speed and had no power, I knew the exhaust was blocked and discovered the converter had disintegrated and blocked exhaust flow. Removing the catalytic converter would increase exhaust gas flow, but I don't understand how it would cause the issue you report. Perhaps a sensor downstream of the converter changed the ECU's air/fuel mix or timing?
No idea to put forward what caused it only reporting the results, maybe less back pressure, maybe as you say a sensor. I forgot to mention it was way louder than stock especially driving next to the concrete barriers and accelerating from a stand still.

The noise and power loss went away as soon as the cats were reinstalled.

I put it in my mind as a loss of back pressure.
__________________
John & Cathy R.
06 Pace Arrow 38L W24
08 Lincoln MKX AWD
See My RV Upgrades
JohnRR is offline   Reply With Quote
Old 09-21-2016, 08:08 AM   #11
Senior Member
 
Join Date: Feb 2010
Posts: 4,457
There are two types of o2 sensor failure.

Just blow out which will cause a code and this is almost none of instances and the most common is "lazy" meaning it reads incorrect.

If we recall the output is somewhere around 1 volt or so.

What usually happens is they get lazy or the range slowly shifts but still can output that 1 volt but it is in a different place.

Think 65 mh instead of 55 ....

So the computer is happy but engine is running rich.

Over time more rich until the converter has more fuel than designed for and it fails.

Learned hard way...If cat fails change sensor too ad cat should last life of car so to speak.

Ford used those honeycomb ones that break so something wracking a hot one could have cracked it.

Here is another use for the ir thermometer.

Upon cold engine start monitor cat temp.

A blown out one stays cool.

Working one gets hot evenly and clogged one gets hot but exit pipe not so much.

OP sounds like replacement in order along with muffler.

Also note many sensors are generic bosch (spelling?) , you can use auto zone.com to get the part number and then amazon often has exact same unit for much less and it is oem for most as they made many of the "branded" parts.
__________________
Tony & Lori
1989 Country Coach Savannah SE
TQ60 is offline   Reply With Quote
Old 09-21-2016, 01:06 PM   #12
Senior Member
 
jleamo1's Avatar
 
Holiday Rambler Owners Club
Join Date: Apr 2016
Posts: 535
Quote:
Originally Posted by JohnRR View Post
No idea to put forward what caused it only reporting the results, maybe less back pressure, maybe as you say a sensor. I forgot to mention it was way louder than stock especially driving next to the concrete barriers and accelerating from a stand still.

The noise and power loss went away as soon as the cats were reinstalled.

I put it in my mind as a loss of back pressure.
Same happened to me with my V10 (last coach) I took it off thinking it would run better...wrong, lost bottom end torque, put it back on. I was shocked how much of a slug it was without it.

OP replace it and the muffler, you can purchase universal ones that might keep your cost down.
__________________
2002 Holiday Rambler Imperial 40PKD
with Residential refrigerator conversion
2014 Jeep Wrangler in tow, M&G brake system
jleamo1 is offline   Reply With Quote
Old 09-21-2016, 02:29 PM   #13
Junior Member
 
Join Date: Sep 2016
Posts: 2
Catalytic converters?

First off thanks to all of you!!!! This is the first time I have tried this way to get information.
Today I removed the muffler and it does rattle but I can't get anything to come out of ether end.
I have also done a little math/investigation with my poor excuse of a log book. From basically new I have averaged 7.39 mpg, sense May 2015 when the tire blew out I have only gotten 5.82 so I think I know the reason the catalytic converter is gone. I guess if I computed my gas mileage instead of just writing down the date,mileage, cost and gallons only I would have noticed a lot sooner something was amiss! I will now start to figure mileage each time, lesson learned!
I would like to know a little more about needing a new muffler, I must admit that because I have never needed to pushed this coach hard I didn't notice any lack of power.
THANKS AGAIN
__________________
billsimi is offline   Reply With Quote
Old 09-21-2016, 04:21 PM   #14
Community Administrator
 
JohnRR's Avatar


 
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Sep 2010
Location: Marquette, Michigan "Da UP"
Posts: 16,559
My inlet pipe was a short distance from a flange once, it was taken apart at that flange it was easy to look down the pipe with a mirror and flash light and see the damaged honeycomb.
__________________

__________________
John & Cathy R.
06 Pace Arrow 38L W24
08 Lincoln MKX AWD
See My RV Upgrades
JohnRR is offline   Reply With Quote
Reply

Tags
converter, cat



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Catalytic Converters wseyler Workhorse and Chevrolet Chassis Motorhome Forum 17 07-21-2016 11:18 PM
New catalytic converters Bajadon Workhorse and Chevrolet Chassis Motorhome Forum 5 04-11-2015 02:09 PM
Catalytic converters Perry D Workhorse and Chevrolet Chassis Motorhome Forum 5 12-15-2013 03:09 AM
Catalytic converters for my Workhorse W22? AnotherTom Workhorse and Chevrolet Chassis Motorhome Forum 10 06-04-2012 02:01 PM
changing converters Jerry C 5th Wheel Discussion 3 09-28-2006 09:25 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:49 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.