Quote:
Originally Posted by Marke123
Hi Guys,
Glad to report next tank got 205 km's before the light came on on a long easy tour. On the same trip I had previously achieve 220 km's until the light came on.
So it's moving in the right direction. I haven't started to adjust the pot on the controller yet.
Roger 04 RT,
I will ground the O2 sensor as requested when I next have the fairing off the bike.
I'm not sure of the intricacies of the controller but was wondering when the O2 sensor is grounded (not 140mV), is that the same effect of (as an example) selecting 7 instead of 8 on the controller?
I had seen same graphs showing how the narrow band sensor had 0.5 V at the correct AF mix and assume this controller just offsets the voltage by an amount.
Regards Mark.
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Hi Mark,
That’s an astute question. First, the AF-XIED has do to more than a simple offset so it has has a microcontroller and does some processing. However, your question is a good one.
Because of the shape of a narrowband O2 sensor’s oxygen/voltage transfer curve, with the AF-XIED grounded and the O2 sensor “grounded” to 140 mV, setting 7 becomes about setting 3-4. That actually results in a fueling improvement, just not as much as you were expecting.
Again because of the transfer curve, you can go to the max setting (11 IIRC) until you add the ground wire and that will get you to about 5-6. If it was me, I’d go to max now and dial back to 6-7 when you add the ground.
Remember though that you need to cut the gray wire and then ground the O2 side of the cut, and leave the ECU side of the cut floating.