02 Signal wire for 1999 Ford Ranger ?

[CitatioN10]

I was outside for hours trying to tone out some wires from the ECU , found a couple but not working as of yet . I got easy access to the main 02's under the truck , I got a 4 wire O2 so I tapped into the gray wire and ran a volt check , I see when I rev the engine the volts go higher . I didnt tap any other wires to check them the same way , but could the gray wire be the one I'm after .. Idle mili volt with negative of volt meter being at battery it was 0.147 , revving it up it would jump up to about 0.190..

Any idea's ?

[mike]

Have you read my instructions? They can be found here: http://www.fuelsaver-mpg.com/doc/EfieInstall.html

[CitatioN10]

Yes I did and that why I came here for questions . I'm trying to install my alldata cd's now

[CitatioN10]

CitatioN10 Wrote:Yes I did and that why I came here for questions . I'm trying to install my alldata cd's now

alldata failed

[mike]

Sorry man, I'm not sure what you mean by "alldata cd's".

That wire you mentioned doesn't act like a signal wire. The reason I asked if you'd read the directions is that it describes how to probe for the signal wire if you haven't obtained the documentation that tells you which one it is. The signal wire should be changing constantly (after it's warmed up a bit), with an average voltage of .45 volts. It won't change much when the engine revs. This is covered more completely in the instructions.

[CitatioN10]

I got a diagram I can post , but it shows signal and signal return

[mike]

It will be the "SIG" wire. But please probe it and measure the voltage to ground with the engine running. It should be oscillating from .2 or .3 to .7 or .8 volts rather rapidly. If not, then re-post what you've found.

[CitatioN10]

OK I will do that today. Thanks

[Gomelesose]

CitatioN10 Wrote:OK I will do that today. Thanks

What happened? Did you get it hooked up right? Seeing any gains?

I have the same wire configuration. It would be helpful to know.

Gomelesose