[NewArt]

Originally Posted by Topless

Those heavy carbon deposits look like excess burned oil in the exhaust to me... but I could be wrong.

Yes, you are probably right. I have replaced the sensor but the readings still indicate a cat problem. Marbe I'll try a smoke test on the exhaust to check for leaks. I changed the AOS in the spring and the MAF is fairly new as well. Hopefully it's not really the cat. Major $ !