Plugged Catalytic converters?

Bill.Barg · **Posted:** Thu Sep 13, 2007 12:56 am

Did you notice the post by tigafila stating that his Catalytic converter was found clogged?

The soot generated by the EGR is one of the downsides of using EGR for emissions control, hence the particulate filters used on some EGRed engines.

Is this failure mode starting to creep up on us? Is my crappy mileage (18 city, 22 hwy) and the relatively small improvement of the ORM attributable to a clogged Cat Converter?

The folks that have used ORM for a long time may be spared this plugging?

How do ya test the back pressure of the CC?

Anyone else have high miles (30K+) , bad mileage, and not use the ORM ?

Bill

Sir Sam · **Posted:** Thu Sep 13, 2007 1:20 am

Bill.Barg wrote:

Did you notice the post by tigafila stating that his Catalytic converter was found clogged?

The soot generated by the EGR is one of the downsides of using EGR for emissions control, hence the particulate filters used on some EGRed engines.

Is this failure mode starting to creep up on us? Is my crappy mileage (18 city, 22 hwy) and the relatively small improvement of the ORM attributable to a clogged Cat Converter?

The folks that have used ORM for a long time may be spared this plugging?

How do ya test the back pressure of the CC?

Anyone else have high miles (30K+) , bad mileage, and not use the ORM ?

Bill

even at 32k when we made the first drive in ours we were getting about 24mpg. the ORM had not been done previously on it.

tigafila · **Posted:** Thu Sep 13, 2007 1:31 am

Have there been other converter failures? Tigafila

BiodieselJeep.com · **Posted:** Thu Sep 13, 2007 2:50 pm

Yeah, how do you check a Cat Con.?

By removing it? And maybe never putting it back on?

Jeger · **Posted:** Thu Sep 13, 2007 2:55 pm

BiodieselJeep.com wrote:

Yeah, how do you check a Cat Con.?

By removing it? And maybe never putting it back on?

I used to check mine by removing it too. Its easy to make sure it isnt plugged....you just have to take a metal rod and beat on it till it goes all they way out the other side.

Shake out the loose pieces and I guarantee you it will never be plugged again.

nix · **Posted:** Thu Sep 13, 2007 3:29 pm

Jeger wrote:

BiodieselJeep.com wrote:

Its easy to make sure it isnt plugged....you just have to take a metal rod and beat on it till it goes all they way out the other side.

Shake out the loose pieces and I guarantee you it will never be plugged again.

LOL! Sometimes it's suprisingly hard to get all the little pieces out..

not that I've done anything like that before...

Bill.Barg · **Posted:** Thu Sep 13, 2007 5:10 pm

Okay, the insepection idea is a good one... but what is it supposed to look like.

BTW. I like what the CC does... nice clean exhaust.

B

BlackLibertyCRD · **Posted:** Thu Sep 13, 2007 5:22 pm

Bill.Barg wrote:

Okay, the insepection idea is a good one... but what is it supposed to look like.

BTW. I like what the CC does... nice clean exhaust.

B

I'm not sure what the CC does on a diesel, could someone fill us in on that?

LocoCRD · **Posted:** Thu Sep 13, 2007 6:04 pm

BlackLibertyCRD wrote:

Bill.Barg wrote:

Okay, the insepection idea is a good one... but what is it supposed to look like.

BTW. I like what the CC does... nice clean exhaust.

B

I'm not sure what the CC does on a diesel, could someone fill us in on that?

Check out http://ect.jmcatalysts.com/technologies-diesel-no2.htm for a good read on Diesel CC's

Pablo · **Joined:** Thu Feb 02, 2006 10:06 pm **Posts:** 1201

Speaking of CAT, does anyone make a highflow diesel cat (real caat, not empty tube) for this thing?

tigafila · **Posted:** Thu Sep 13, 2007 11:46 pm

When I was a tech I rodded out many a converter on gassers. Sometimes you really have to work at it to get all the pieces out. It is supposed to look like a honeycomb and you should be able to look all the way through it if you shine light in the other end. I have been so busy and haven't been able to check it myself or that's probably what would have happened to this one. It's tough when it plugs completely on the road.

Jeger · **Posted:** Fri Sep 14, 2007 7:34 am

I know if they are plugged up they will get really really hot! Maybe we could come up with a "normal" temp under a given set of conditions......

We had an old LTD Police interceptor that the CAT on it would get so hot you could see it glow at night time :shock:

That one got the rod.

retmil46 · **Posted:** Fri Sep 14, 2007 10:10 am

I can see it now, a new edition of that classic book - the diesel version of "101 Uses for a Dead Cat". :wink:

jrsavoie · **Posted:** Mon Sep 16, 2013 1:18 pm

Pablo wrote:

Speaking of CAT, does anyone make a highflow diesel cat (real caat, not empty tube) for this thing?

The only Aftermarket, high performance diesel cat I found is from Random Technologies 6" diameter 770 554 4242
About $600
http://www.randomtechnology.com/

EAB · **Joined:** Tue Sep 06, 2011 9:39 pm **Posts:** 141

EAB · **Joined:** Tue Sep 06, 2011 9:39 pm **Posts:** 141

Joke BTW

Diesel derelict · **Joined:** Sun Sep 02, 2012 11:37 am **Posts:** 12

My buddy burned his Cherokee to the ground from a cat. Fire. No real lose butt it would be a shame to loss a crd from a unneeded part like that. Scrap em all I say

:CAMPING:

Plugged Catalytic converters?

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