[Diy_efi] changing wbo2 reading via timing
Adam Wade
espresso_doppio at yahoo.com
Wed Dec 18 06:39:18 GMT 2002
--- Shannen Durphey <shannen at grolen.com> wrote:
> The "instantaneous residual oxygen reading" is the
> output of the sensor,
> which shows up as a voltage trace on my scope.
I was talking about a snapshot. Static. Thus,
"instantaneous". I'm sorry that wasn't clear.
> Rich running and lean running can look similar,
Not with a four-gas they can't.
> but as a tuner in the same room as the dyno, I can
> smell the difference between excess fuel and lack
> of same to the point of misfire.
Maybe if you know the engine, and have already tuned a
few. You can't "smell" whether an engine is rich or
lean any more than you can "smell" whether you have
optimal ignition timing.
> And I'm not separating the exhaust gasses out of
> individual cylinder.
But you claim you can tell me what cylinder is
producing a transient on your WBO2 (assuming it's
actually a measured transient, and not a source supply
fluctuation or RMI).
> Diagnostic procedures for finding a misfire are
> easy, just like diagnostic procedures for
> determining a sufficiently rich engine ( and thereby
> a sufficiently lean one ) are easy. In both cases
> you need to bring in "outside" information.
I suppose that depends on where you draw the line at
"outside". Observing an engine at all bring in
"outside" information.
=====
| Adam Wade 1990 Kwak Zephyr 550 (Daphne) |
| http://y42.photos.yahoo.com/bc/espresso_doppio/lst?.dir=/ |
| "It was like an emergency ward after a great catastrophe; it |
| didn't matter what race or class the victims belonged to. |
| They were all given the same miracle drug, which was coffee. |
| The catastrophe in this case, of course, was that the sun |
| had come up again." -Kurt Vonnegut |
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