EFIE wiring Help

[fastcompacts]

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 :)

[richard_lyew]

i have all the ECU diagram for neon, i installed hho systems in 4 of them already with AFC. if you want the diagrams email me

[lhazleton]

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 :)


Both whites are for the heater element.
Grey is the ground.
Black is your signal wire.

[fastcompacts]

Both whites are for the heater element.
Grey is the ground.
Black is your signal wire.
Im getting around 2.9-3.2 volts and it fluctuates at both idle and when the rpms go up. So would this be the right wire. I have heard that certain dodge vehicles have higher voltage for the O2 signal wire.

[lhazleton]

The voltage will constantly change. Using a typical voltmeter, you won't be able to get an accurate reading anyway. The signals are so fast, you need one that will read in nanoseconds, but this isn't needed. Just be sure the pos. from the EFIE goes to the ECM & the neg. goes to the sensor.

Lee

[fastcompacts]

The voltage will constantly change. Using a typical voltmeter, you won't be able to get an accurate reading anyway. The signals are so fast, you need one that will read in nanoseconds, but this isn't needed. Just be sure the pos. from the EFIE goes to the ECM & the neg. goes to the sensor.

Lee

The link has the actual Efie that i have. so i currently have 12v+, ground, wire from the O2 sensor, wire to the computer. Just want to make sure that this is the right way that it should be hooked up. You guys have been a great help. thanks so much:)
http://www.fuelsaver-mpg.com/doc/EfieInstallDigital.html