Rotten Cat on a 2002 S

[gazrawly]

When you get the durametric, just log the MAF sensor readings at wide open throttle. I did have an issue with my car a while back with a faulty MAF sensor which led to the MAF effectively seeing 75% or so of true air flow and so was down on power. It actually performed better with the MAF sensor disconnected. I did notice a decent increase in power once I changed the sensor