Originally Posted by
RobertISaar
not that i can see..... well, maybe. :) the only analog inputs that aren't pulled up via a resistor are TPS, MAP and pump voltage.
narrowband O2 has a voltage multiplier of 4.5 to bring the 0-1.1 volt signal up to the 5 volt range that the A/D system works off of... you SHOULD be able to setup a resistor based voltage divider to bring the wideband O2 voltage range from 0-5V to 0-1.1V to make it readable via the narrowband O2 circuit(which will amplify it up to the 0-5V range again), which is already in the datastream IIRC. just have to disable closed loop and add the item into the ADX and you'll be done.
the voltage divider would be ~2 high tolerance resistors(1% should be fine) and can be done externally of the ECM. that meet your needs?
Here's an idea, the MTX-L provides a simulated NBO2 0.1 ~ 1.1 VDC output that could replace the existing NB input. From the Inovate MTX-L Manual "Analog output two (brown) is 1.1V = 14 AFR and .1V = 15 AFR. This is a simulated narrowband signal"
So I'm thinking I can disable the Closed Loop, but I'll need help with the .adx
dave w
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