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Originally Posted by XfireZ51
Todd,
Why don't we discuss Proportional Gain?
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OK. What do you want to know about it? It is pretty simple, and the first of three potential PID parameters to control pulsewidth based on feedback from the O2 sensor. There are primarily two tables at work...one is the base response to O2 error vs. airflow. There is a smaller proportional step at zero airflow (idle).
These steps are then multiplied by a factor, depending on how large the O2 error is. The bigger the error, the larger the multiplier. You end up with an adjustment "count" to modify the base pulsewidth. If the error is positive, fuel is removed and vice versa.
Todd