I've been crazy busy with life but about a month and a half ago I got a CEL (bank 1 upstream lean). Had the O2 replaced (didn't have time or warm place to do it myself) well 3 weeks ago the same code came back so i figured I would gut the precat and clear the code. Today the code came back so I figured I'd replace the fuel filter early because my g/f said it seemed like it was running out of gas. I opened the old filter and it was way way too pluged up for the miles on it. I'm planning to pull the gas tank this summer to make sure its clean (and replace the sending unit).
I hope I got it fixed now.
Sent from the motor bay of my S15