how do you know if your cat is going bad. I think that mine is, my truck makes a ratteling noise and you can feel a vibration when a accelerate from a dead stop. could this be caused from the cat? thanks

 

you would smell sulfur and it will kill your acceleration, once it clogs up though... your not going anywhere.

i also think you might get a CEL

 

my acceleration seems to have went way down. i feel like i am always smashing the gas to get going latley. but no sulfur smell yet.

 

With the truck running, get underneath and see if you can hear where the rattling is coming from. If its the cat, then either the heat shield has come lose or, more likely, the cat is bad.

A Magnaflow High Flow catalytic converter is the preferred replacement choice.

 

Mine rattled for a while befor it finally got to where you noticed performance loss it was due to the waffle cone inside had broke in halve and would only restrice flow under acceleration. I had absolutly no sulfer smell. I gutted mine and made a O2 extention to the rear O2 and the problum was fixed. Even after gutting it i have never noticed any sulfer smell and the truck runs 310% better.

 

haha well, i've heard you would have that smell.

my cat went bad when my dad was driving it, had no power at all essentially. that was a few years ago.

 

I have never understud way some truck with stink and some trucks won't after the cat is removed.

 

sulfur in the gas, and the better in tune a truck is, the less the cat is actually needed.

 

Thats the thing though, the noise doesnt happen when im ideling, only when i accelerate forwad. Never hapens in reverse.

 

how did you make your extension?