Got around to an exhaust shop today to repair something else and took a look at the o2 while I was down there; it's definitely hitting. The friend I had install my headers didn't even dent in the floor pan so the sensor is rammed into it to the point of being bent at the end. So the only way to undo it is to cut is out, re-weld the bung elsewhere and pop in a new sensor.
*sigh*
Pardon my ignorance though, but would somebody mind explaining to me how the o2 making contact with the floor pan contributes to engine knock? Not arguing the point, I just can't figure out. And there aren't any codes related to the sensor.
Thanks peeps.
