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Catalytic Converter Test Pipe?
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=78678		 Page 1 of 1
Author:  jtz54 [ Mon Mar 24, 2014 1:29 am ]
Post subject:  Catalytic Converter Test Pipe?
Had a turbo muffler installed with 138K. Some performance gain but I thought the mileage would increase too.
Starting to suspect the CAT may be plugged? Does anyone make a test pipe I can swap in to see if the mileage increases?
If not, what's a good way to tell if the CAT is plugged or restricting the exhaust?

New HG & ARP Studs
GDE Eco Tune FT
Turbo Muffler
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Racor 245
Lift Pump
Author:  03CDKJ [ Mon Mar 24, 2014 8:52 am ]
Post subject:  Re: Catalytic Converter Test Pipe?
You should be pulling up codes if your cat is bad..... Mileage won't increase with a muffler mod....
Author:  mass-hole [ Mon Mar 24, 2014 11:01 am ]
Post subject:  Re: Catalytic Converter Test Pipe?
03CDKJ wrote:
You should be pulling up codes if your cat is bad..... Mileage won't increase with a muffler mod....


I dont think that is true for the diesels. I dont believe there are any sensors around the cat for it to know if its bad.
Author:  WWDiesel [ Mon Mar 24, 2014 6:21 pm ]
Post subject:  Re: Catalytic Converter Test Pipe?
Only true way is to remove it and drive without it. There is a bolt together flange in front of the CAT that can be temporary disconnected and moved to one side for a test. Just be sure and wire the CAT up with some safety wire while driving to keep it from falling down and contacting the ground. It will be a little noisy while testing! :SOMBRERO:
As others stated, there are no sensors before or after the CAT on a Jeep CRD! That is what makes it so easy to permanently remove it if you are not subject to tailpipe inspections... :BANANA:
Author:  jtz54 [ Tue Mar 25, 2014 4:11 pm ]
Post subject:  Re: Catalytic Converter Test Pipe?
Anyone know a source for a replacement cat? Hate stealerships.

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Author:  AZ CRD [ Tue Mar 25, 2014 9:37 pm ]
Post subject:  Re: Catalytic Converter Test Pipe?
I've heard tell that a good cleaning procedure for the CAT (which is not really a catalytic converter but a soot trap) would be to disconnect the muffler at the flange just downstream of it and ram a suitable length--maybe 2 - 2 1/2 feet-- of 3/4" galvanized pipe into it repeatedly to "dislodge" the collection of crud.

****WARNING**** This method may also destroy the innards of the thing and allow exhaust gasses to be expelled out the tailpipe without hindrance. I neither recommend nor condone it.

Otherwise, a good Italian tune job might work.
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