---- David Hardy <david@PLANETMIND.NET> wrote:
> >        You actually answered your own ? before you asked it. In a
> > ComputerControlled FuelInjected N'A' vehicle (especially if it is
> > OBD2) the lack of AirDensity @ Altitude is compensated for by lowering
> > the amount of gas' that is injected into the IntakeManifold so as to
> > attempt to maintain a StoichiometricFuelRatio.
>
> So I have a question: Do we dwellers-at-altitude still need to advance
> the ignition timing of our wasserboxers with the "1 degree per 1000ft
> above 4000ft" rule? The 02 sensor can compensate for less oxygen, but
> does it adjust timing?  Google doesn't seem to have a definitive answer.

Hmmm..... .  If that adjustment is required, what are we who drive back and forth supposed to do?  In a given summer I may drive in the Rockies and at sea level, and of course there is getting there.  I thought the oxygen sensor, the AFM, and the computer took care of all this within programming limits.

mcneely

>
> David

--
David McNeely