Can a header collector leak make the o2 readings innacurate?

[Roger Heflin]

On Mon, 12 Jun 2000, Gerald Pelnar wrote:

> >       If the O2 is "reading" the additional oxygen in the
> exh sys , it is 
> > very possible
> > the ECM will correct for this condition. 
> 
> You'll have to explain to me how the ECM can correct
> for this. As I see it, the ECM will see o2 and increase
> the fuel. Still seeing o2.  Hmm, more fuel. Hmmm still
> o2. PIG RICH! Hmmm o2 sensor must be bad, set code,
> LIMP IN!
> 
> Doesn't seem to be much of a correction.

I think what he is saying is that the PCM will attempt to correct for
what it sees as a problem, which will only make things worse.

Seeing the "correction" is a big clue that there is a leak.


				Roger
				

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