Ok, let's say someone who didn't know that my car hadn't been tuned yet drove it. For like 80 miles. It must have run extremely rich, through the whole band, like 12:1 or so. So now I'm tuning it, and the wideband doesn't seem to respond at all. At idle it reads accurately, but anywhere else, I get around 12.45:1. I pulled it, and it was covered in carbon deposits, thick, fluffy, velvety carbon. I wiped it off, being careful not to get it inside, but I'm still not getting a very good response at anything above about 1200 rpm. Could it have been fouled inside, and thus screwed up pretty bad? Is it possible to fix it, or should I order one now, and wait another two weeks without a decent car to drive?