wideband gauge reading lean.

[b00stinbmx]

what would be the cause of this? my AEM Uego wideband is not working properly because now its showing that im at liek 16 afr at full boost and basically not reading anything when im out of boost. its not correct becuase my motor is running perfect, no knocking, fuel pressure is good and its producing good power. but anyway the o2 is bunged in right after the 2nd bend in my downpipe, maybe too close to turbo? i've been checking for exhaust leaks and i even just fixed 2 broken exhaust studs a week or so ago and that didn;t do anything( witht he wideband issue). but im not able to really find anything. i might add that im running NO cat and a straightpipe exhuast. i also noticed that if i put my hand or something over the exhaust to restrict flow a little more at idle it will start to read like 17.5 ish and not just --. im thinking either the bung isn;t seated into the downpipe enough and the flow of exhaust isn't going through it enough, or the thing is just f***ed up. and i have no idea of how to tell if the sensor is good or not. but it was working correctly on my friends wrx when he had it before me. any ideas?

[eh?]

Do this simple testhttp://www.youtube.com/watch?v=1mb4VmDd0ao

[b00stinbmx]

thanks for the link. tried it and it tested out fine. i fixed whatever exhaust leaks i figured i had. none were major at all. still doing it. its reading like anywhere in the 15 range at full boost and i KNOW this is not right. the car made good power on the dyno and i've been beating on it all summer, i know that the AFRS are right or if anything its running rich, fuel pressure is around 65ish at full boost and it after-fires every now and then. i just want to figure out why the damn gauge won;t read correctly.

[l0nestar]

I can't see the video, but check your grounds on your wideband.

[eh?]

Throw it on a dyno that has a tail pipe wideband sensor. That will tell you if your wideband controller is shot or not. I've heard of aem uego going bad so that may be the problem.

[DrifterProdigy85]

Probably need a new wideband o2 sensor. I've heard they read lean when they go bad.