Got your PM, and I hope you don't mind that I copy some of it here for others to reference in the future too;
It's more than likely it's intecepting the signal and altering it just fine. If it wasn't, your car would be running horribly. Just at idle, with no load, it hasn't reached the point of changing the LTFT. Dive it around for a day or two and it will probaly change.
If you really want to see it's effects and make sure it's working;
Set your logger to monitor front O2's (important for this). Turn the car on and let it idle.
On the AFC, slowly work your way lean, you'll start to hear misfires (popping sounds). A good point is probably where things just start to pop a little but are pretty close to "smooth" (rich). Watch the O2 sensor voltage. Normally the voltage will swing back and forth between .2 and .8 volts at idle. As you adjust leaner, the ECU will compensate back richer. Slowly click down leaner, you will then see the O2 voltage come back up slowly. This is the ECU re adjusting. Keep going down until the ECU can no longer bring the voltage back up to .2 to .8volts.
That's the old way of figuring out your low settings by only monitoring O2 voltage, but it works and will show that your AFC is working.
http://www.roadraceengineering.com/newafc.htm
Warrtalon said:
It's more than likely it's intecepting the signal and altering it just fine. If it wasn't, your car would be running horribly. Just at idle, with no load, it hasn't reached the point of changing the LTFT. Dive it around for a day or two and it will probaly change.
If you really want to see it's effects and make sure it's working;
Set your logger to monitor front O2's (important for this). Turn the car on and let it idle.
On the AFC, slowly work your way lean, you'll start to hear misfires (popping sounds). A good point is probably where things just start to pop a little but are pretty close to "smooth" (rich). Watch the O2 sensor voltage. Normally the voltage will swing back and forth between .2 and .8 volts at idle. As you adjust leaner, the ECU will compensate back richer. Slowly click down leaner, you will then see the O2 voltage come back up slowly. This is the ECU re adjusting. Keep going down until the ECU can no longer bring the voltage back up to .2 to .8volts.
That's the old way of figuring out your low settings by only monitoring O2 voltage, but it works and will show that your AFC is working.
http://www.roadraceengineering.com/newafc.htm