So, about a month ago I hit something huge in the middle of the road, ripped a hole in my downpipe, welded it back together, and everything was fine (thanks for all the advice from people on here). Since that happened, my wideband is telling me I'm running at 14.3 AFR's while cruising around town. While I realize that isn't THAT rich, it concerns me because I used to cruise at exactly 14.7/14.8.
Since the rear O2 sensor controls the fuel input to the motor, is there a chance that maybe something broke inside of it, or it fouled somehow, or got dirty during the 3 days that my down pipe was leaking? I know 14.3 isn't going to be detrimental to the motor, but it ran perfectly for so long, now it's just ever so slightly off.
I also thought it could just be the weather It's really cold here in Ohio..
I've got a Cobb intake, downpipe, accessport, and a GReddy Evo 2 exhaust. Flashed to stage 2, and was running perfectly until just now. Any help? Or suggestions?