o2 sensor

[totta Crolla]

I will explain this as best I can.
Just fitted a Cusco MFE ecu to my modded big port engine, everything is ok with that, however this ecu can support an o2 sensor input. As my car car is U.K spec. it does not have a o2 sensor fitted but uses a manually adjustable potentiometer for fuel enrichment.
Could I use an o2 sensor instead of the potentiometer or would I need to use a different ecu pin ?
Are there any benefits to running an o2 sensor ?
Thanks for any help.

[Chrisso]

If you're going to fit an o2 sensor you might as well fit a wideband one. In which case you'll get a bung with it and a controller. Get the bung welded into your exhaust at the correct spot and angle, connect to the controller and connect to your ECU - assuming it's aftermarket.

If it's piggyback, then I don't know that I would bother. You're toyota ecu may be able to handle a narrowband sensor and you should be able to tell by opening the case and looking at the pin markings (I know mine has both a pot pin and an o2 pin). Depends on how the other ECU uses the inputs. The more I think about it though, it should be pretty cheap to throw one in so maybe give it a go.

[totta Crolla]

I have a wideband (innovate) fitted that can emulate a narrow band output so I thought, if it would work, I would do it that way.
As yours has both inputs I assume one of them is not connected and you would only use one input.
The MFE is a direct replacement for the stock ecu but it allows via dip switches and a potentiometer to correct fuelling and ignition timing.
I did try to adjust the idle afr with the pot but nothing happened so I guess that input is not connected on my ecu then.
Very helpful, thanks.