Exhaust leak affecting O2 sensor?

[Huw Powell]

radek at istar.ca wrote:
>
> Hello group.
> I discovered an exhaust leak between the manifold and the catalytic coverter - looks like
> a blown gasket.  The leak is BEFORE the exhaust gases reach
> the O2 sensor.  Would this affect the sensor's readings?

theoretically, yes.  If some air is drawn in through the leak, even just
sometimes, the OXS will read it and infer a lean mixture, causing a rich
mixture as it compensates.  And no matter how much fuel it tries to dump
in, the air/oxygen will still be there.

Also, the leak will allow combustion products to escape ahead of the
passenger compartment and kill you...

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/