> Hey guys - I found this good info site that should help those
contemplating this
> install. This particular site is from AutoMeter and they even have an
animated
> pic of my exact gauge showing it during normal operation (oscillating
around
> Stoich)... The reason I initially choose this one is because of the
number of
> LEDs (and having never been disappointed by AutoMeter). I was thinking
that the
> extra LED's arranged in a 270 degree sweep would provide more resolution -
and
> it does. But, later I found out that regular O2 sensors (like ours) can
only
> accurately measure 14.7 to 1 (Stoich) A/F ratios. They are used by the
PCM only
> to determine if less than or greater than that "magic" value. Any
attempts to
> use them to determine ACTUAL A/F ratio at any given instant are futile as
they
> just don't work that way (even though AutoMeter instructions lead you to
believe
> otherwise!). ONLY a wideband O2 sensor (very, very expensive) can give
you
> ACTUAL values at any given instant. I want one of those 8). This is why
the
> guys in the know always say to tune your vehicle while on the dyno 'cause
they
> will have the wide-band type. EGT's are just as good (better?) and are
less
> expensive...
Shane,
So basically does this mean that A/F Ratio Monitors are fairly useless on
our trucks when tapping into the stock 02 Sensor? I did think about this
because when scanning my truck, the 02 sensor was going all the volt range,
which would explain the display on the Auto Meter A/F Monitor:
http://www.autometer.com/hp/techtips/air_fuel_hookup/air_fuel_hookup.html
Good to know before I actually did a Summit order tonight.
Kyle
93 Dakota 4x4 V6
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:59:56 EDT