Originally Posted by King of Beers
Could be your cat, Could be an electrical problem. It could be allot of things.
The loss of power certainly could be from a clogged cat... Though I don't believe that is usually something that shows up all at once. It would build over time.
I would check my plug wires and maybe my fuel pressure.
There are allot of things it could be. I'm just kind of stabbing in the dark here.
I'll check out the plug wires (need to replace the plugs anyway) and fuel pressure, see how that's doing.
As to the catalytic converter issues building up over time... could the rattling that has been going on down there for the last couple of weeks have been the beginning of that? I've somehow never run into exhaust issues with any of the POS's that I've had, so I'm not sure about these things other than word of mouth.
Originally Posted by FNjeep
I'd check your air filter, for the simple solution and the vacuum tubes coming out from the box.
However, it does sound like a Catalytic converter problem from what you're describing. You'll need to replace the Catalytic converter to keep your Jeep "Street Legal" in most States emissions tests.
I put a new filter into it when I got it a few months back, and the hoses are all clear (they even look new, maybe from the PO who seemed to keep it immaculate).
Thankfully, the Catalytic Converter isn't an issue in Kentucky, where they did away with emissions testing a few years back.