Quote Originally Posted by darcy View Post
Post-cat positioning of your wideband should not cause it to read lean under load.
Well I know the sensor was after the cats at the collector and the sensor bung was welded upside down so idk it moisture was giving a fake reading but it never had the issuer before only after the car and it's was only at 85kpa ish and above so under load im guessing cats are getting hot and working and removing hc/fuel from the exhaust stream and making it appear to have a hight O2 content making the sensor read lean. But that's just my guess