One other thing could be a bad O2 sensor. Since you are removing it, you might as well test it.
Autozone for O2 sensor test

As for the other options, other than replacing, gutting a plugged cat is the only way to go.

Last edited by Tony2005; 08/17/06 04:20 AM.

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles