PE Tables and WOT Threshold
Trying to understand how this works. The FA Power Enrich vs Aircharge vs RPM table represents the desired air/fuel mixture at a given cylinder aircharge and engine RPM. The ECM takes these values and determines the appropriate injector duty cycle to deliver that desired air/fuel ratio. But since this is "open loop" the ECM isn't able to correct the final result. In other words, the computer thinks its delivering 12 AFR, but the measured result on the wideband might be 12.5 AFR.
Am I correct so far?
So part one of my quesiton is about modifying this table. I know at a given aircharge/rpm, the computer is commanding something like 11.5 AFR, but I'm actually measuring 12.5. Now if I want to make it 12, I could just tell the computer to command say 11.0 and then I might end up measuring 12. Maybe that works, but it's really saying that something else is out of calibration. I really need to be telling the computer that it needs to inject more fuel in order to get to that desired ratio as opposed to just faking it, right?
Is there another table I should be tweaking instead?
And my second question is about the setting "WOT Pedal Thresh" which is currently set to 3.1V. I've been monitoring my accel. pedal voltage at 4.57V during WOT. Is this threshold just telling the computer when to switch from normal closed loop to open loop power enrichment? I've also noticed that at wide open throttle, the accelerator pedal position percentage is only about 92%, throttle position 86%, and commanded throttle 76%. Shouldn't these all be at 100%?