guess thats what i was looking for

 

Yes, but does the PCM really handle only 1v on that pin? If you ground out the power to an O2 does it read 1 volt or 5 volts (I forget)? I'd bet that the circuit would do 5 volts, I bet GM just uses the same circuitry for everything, since everything else is 5v I bet that it'll work. I don't see them running a whole stepped down subcircuit for just the O2s, but they might. I'll try it once I get a job and can play around some. I'll do it when I do my E85 tuning...

 

Is the EGR position input a 0-5V source? Do you happen to have the link to the older thread talking about this?

Kevin

 

i am interested as well, i was thinking about using the ac wires also or the egr if anyone can figure it out

 

I'm ordering a PLX M300 on friday, as soon as it gets here I'm going to try to figure this out. I'll keep you guys informed. I'm still looking for a wireing diagram for the egr connector. After reading the pinout for the PCM it seems that the EGR position sensor is a brown wire, and there is a brown wire going into the EGR harness, but like I said, I haven't tried it out yet.

Also, does anyone know where I can buy a 5-pin shrouded male connector that fits the EGR harness?

Kevin

 

Good luck. Post up how it goes.

 

Found it:
old thread

And yes it's 0-5V. One of the wires is a 5V reference from the PCM.

 

Nice find. I spent about 30 minutes trying to dig it up but failed miserably. I probably had it pop up and didn't even realize it.

 

would really like to know if this has worked out for anyone. I wouldn't mind using a rear O2 sensor being that I don't have them anymore. It would save lots of us the $150 for the interface.