2003 Yukon help please!!!

[yukon03]

I am new to the forum so hello to all first. Now I have a 2003 yukon with right around 189k on it. It ran great up until last week. Here is my question is there a good or easy way to gut the cats on these just so I can drive it before I replace the cats? After reading a lot online I have pretty much determined it to be clogged cats. I have no check engine light on and it will run fine until I get on the gas then it will bog down and lose power. It also seems to happen more after it warms up a bit. Also has anyone put on the evan fischer cats? I have found the "Y" with the cats online at a decent price and wanted to know if it was a direct fit cause id like to save myself a little money and do it myself.
Thanks for your time,
Mike

 

[kschumake83]

If you end up gutting them yourself let me know how it works. I have been thinking about doing it myself and putting a set of spark plug defoulers on the o2's so I can pass emissions.

Sent from my SAMSUNG-SGH-I747 using Tapatalk 4 Beta

 

[yukon03]

Well I just removed the O2 sensors in front of the cats and the engine still idles rough but at least when it dies I can restart it again. Exhaust still comes out of the tail pipe and stinks of sulfer bad. Could it be idling rough due to O2's being out or still the clogged cats?
Please help!! LOL

 

[angrysam]

It could be from the O2 sensors being out, PCM can't adjust the fuel/air mix correctly. See if you can get your hands on a backpressure gauge and screw it into the O2 port. If you're around an 8 or higher you have a plugged cat.