I have not, but would that effect drive-ability? Is the computer throwing more fuel at the cat because it's rich?
Here's a snap shot of where it typically misses / hesitates:
Engine RPM (SAE) 3,385 rpm
Throttle Position (SAE) 32.2 %
Timing Advance (SAE) 24.0
Mass Airflow (SAE) 37.0 g/s...