[Diy_efi] O2 says rich, car runs lean..

[Gary Spooner]

Hello.

Regarding narrow band 02's I have to disagree with the opinion about narrow 
band inabilities to provide and accurate indication of 02 content. This 
sensor has proven over the years to maintain 02 content within emission 
specs where the algorithm is not biased to look for an alternate backup if 
closed loop info fails. Narrow band sensors are capable of millisecond 
response and range even to the point of indicating incomplete combustion 
from a cylinder or cylinders if observed on a scope with resolution 200m/sec 
and .25Mhz.

Tuning accompanying the use of a scanner to indicate 02 voltage, 
interrogator values and long term conditions, using the factory computer, 
have found tuning to be very easy and let the computer scrub the converter 
even at idle speed. Factory constants have to be changed but the result of 
the adjustments is impressive. I have setup numerous boats and even tailored 
a rat?s nest of mismatched parts creating algorithms that work. Don't jump 
on the wide band wagon (lol) yet. Narrow works well to...

Gary/RPM Research
rpm-research.com

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