will a small exhaust leak change my wideband readings a lot?

[ryans1000]

I have a really small exhaust leak on a vband flange that I can't get rid of. Its before the turbo. I have the wideband about 3 feet after the turbo.

I can't actually feel any air come out of the connection but I can hear it and see a black stain near the leak

Will a small exhaust leak change my wideband readings a lot?

[GAMEOVER]

I think it will....

[ryans1000]

well the leak is so small that I'd guess probably 1/1000th of the total air volume is flowing through that leak.

Wouldn't the air that flows out the exhaust leak be mixed are therefore not effecting afr? I wouldn't think fresh air will flow into the piping because it is pre turbo and the backpressure should be higher then atmospheric.

[eficalibrator]

YES. Fix the mechanical problem before you get too deep into the calibration.