Originally Posted by
MrMoPar
I have been successful in control of closed loop fuel AFR's by applying an O2 sensor voltage offset. The ECU sees it as a lean condition and adds fuel to bring it back to what it "thinks" is the correct 14.7 AFR. I have used this for part throttle boost fuel control while still in closed loop and it works very well. I can control AFR to within .2 to .4 of my target which is fine for light load part throttle boost on a turbo.
This is what the S.S. Enricher is supposed to do. As you can see here offsetting the voltage does not effect the trims. The guys at S.S. where stumped also.