Hi all. I have a 2003 dode neon 2.0 liter 4 cylinder. I am trying to wire up my efie today and i am having a little trouble trying to decode the numbers that i am reading. Also the O2 sensor has 4 wires, 2 white 1 grey and 1 black.
White #1 showing around 100mV at idle and goes down when the engine is revved
White #2 showing around 6.2 volts at idle and goes up when the engine is revved.
Grey 2.5 volts constant does not change when revved
Black I am assuming this is the ground.
So which wire should i add my efie to? I was originally thinking the White#1 as it is the only wire with mV. But i could be wrong. could someone with experience please help. Thanks a bunch