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TimG
Dodge Dakota
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1/09/2007
11:50:05
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 Subject: Plugged cat converter
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Message:
So my 3.9 gets alot of blow by, the rings and valve seals are shot (rebuild is coming soon I hope). I assume this will plug the cat converter up but how do I tell ??
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works2long
Dodge Dakota
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1/09/2007
20:57:27
|  RE: Plugged cat converter
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Message:
theres a catmonitor just like an o2 sensor it will tell the computer that its clogged.....but for real i have never seen a clogged cat unless u use additives
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Bob Lincoln
Dodge Dakota
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1/10/2007
08:36:09
| RE: Plugged cat converter
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Message:
"but for real i have never seen a clogged cat unless u use additives" I've seen two in normal driving - both between 100K and 130K miles, in a Dakota and in an Acclaim, both well-maintained.
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?
Dodge Dakota
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1/10/2007
08:55:13
| RE: Plugged cat converter
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Message:
Newer cat's will NOT get 'plugged'..
However , the "active" elements may get
contaminated or covered up with gunk and
thereby lose effectiveness.
They can also become TOTALLY cleaned { burnt }
out so that nothing is left inside...
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Bob Lincoln
Dodge Dakota
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1/11/2007
08:30:44
| RE: Plugged cat converter
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Message:
Well, I haven't cut open a recent catcon, but what happened in both of these cases is that the honeycomb broke loose and balled up, blocking the flow completely - so badly the vehicles would not even start. I'm not sure why a "modern" one could not do the same. What's different?
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N56629
Dodge Dakota
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1/11/2007
10:49:23
| RE: Plugged cat converter
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Message:
The catylist coming loose and the cat being plugged are not the same thing. It's even possible to have the catylist break into pieces and clog the muffler or, in the case of a straight thru system, get blown out the tail pipe. It's difficult to tell what people are talking about when they simply say "my cat is plugged."
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7zark7
Dodge Dakota
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1/29/2007
16:07:58
| RE: Plugged cat converter
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Message:
Would this cause poor gas mileage but still allow the truck to pass a smog test?
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J and J Auto
GenII
1/30/2007
00:56:56
| RE: Plugged cat converter
IP: Logged
Message:
a big loss of power is what a pluged cat will do
I would first get a new o2 sensor
ngk.com buy direct same as factory around $60 with
shipping
Any cat can fail and plug
up to 95 obd1 there is no down stream post cat
o2 sensor to tell the comp it has faild only
96 and up have this second o2 sensor
the o2 lazy will kill gas mileage and power also
with a pluged cat it will have a quiting effect
less noise coming out the tail pipe
lots of blow back and your oil will turn black
real fast
go from there but start with the o2 sensor
Larry
J&J Auto
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J and J Auto
GenII
1/30/2007
01:02:04
| RE: Plugged cat converter
IP: Logged
Message:
truckperformance.com has the slip fit carsound
high flow cats for around $90
just mesure overall length cut the old one out
leave 3" for the slip 1 1/2 each end and get 2
clamps and your done
As someone once said on this board they need to
be welded in this is a pile of crap they do not
need to be welded in
Larry
J&J Auto
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7zark7
Dodge Dakota
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1/30/2007
10:27:29
| RE: Plugged cat converter
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Message:
That's strange. I have a 96 but I don't remember ever seeing a 2nd o2 sensor when I was under there.
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TimG
Dodge Dakota
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1/30/2007
10:53:29
| RE: Plugged cat converter
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Message:
Changed the cat, that made a difference. New 02 sensor and a muffler is next
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Mike Stager
Dodge Dakota
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1/31/2007
00:50:15
| RE: Plugged cat converter
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Message:
I'm with Zark, I've got a 97 and only have an O2 sensor AFTER the cat.
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Flippy
Dodge Dakota
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1/31/2007
01:30:13
| RE: Plugged cat converter
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Message:
i don't know if it is illegal where you live but i would just cut the cat right out, install headers and run true duals right out to the back, did it with mine and man it sounds mean and runs better.
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Bob Lincoln
Dodge Dakota
JOIN HERE
1/31/2007
09:01:17
| RE: Plugged cat converter
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Message:
"i don't know if it is illegal where you live" It's illegal everywhere in the US, as it violates a federal law to tamper with or disable any emissions control.
"I've got a 97 and only have an O2 sensor AFTER the cat." Impossible. There's ALWAYS an upstream one since the beginning of O2 sensor use in the early 1980s.
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