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redragon86 · 09-30-2023, 12:08 PM

Hello.

My engine (Loncin RE250) runs lean from the factory and I would like to enrich the air fuel mixture since I'm thinking of installing a full exhaust on it. The problem is that that the ECU that came with the bike isn't an original Delphi but a Chinese copy called Wantao, and from the tuners I spoke with, the ECU has its calibration map locked and can't be reflashed so ECU tuning is a no go.

I started searching for more solutions online and came across an O2 sensor simulation method which tricks the ECU into pumping more fuel by lowering the voltage reading on the sensor with a resistor on the positive wire, tricking the ECU into thinking that it's running lean and in turn, telling the injector to pump more gas enriching the AFR.

So my question is: how well does this actually work and is it possible for me to do on my bike?

Thank you in advance!

09-30-2023, 12:08 PM	#1
redragon86 Join Date: Aug 2023 Posts: 3	O2 Sensor Simulation Hello. My engine (Loncin RE250) runs lean from the factory and I would like to enrich the air fuel mixture since I'm thinking of installing a full exhaust on it. The problem is that that the ECU that came with the bike isn't an original Delphi but a Chinese copy called Wantao, and from the tuners I spoke with, the ECU has its calibration map locked and can't be reflashed so ECU tuning is a no go. I started searching for more solutions online and came across an O2 sensor simulation method which tricks the ECU into pumping more fuel by lowering the voltage reading on the sensor with a resistor on the positive wire, tricking the ECU into thinking that it's running lean and in turn, telling the injector to pump more gas enriching the AFR. So my question is: how well does this actually work and is it possible for me to do on my bike? Thank you in advance!
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