Wide Band without an interface
Thread Starter
TECH Enthusiast
Joined: Mar 2003
Posts: 618
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From: San Diego
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... 
Originally Posted by horist
^^^ thing I'd be concerned about there... the stock O2 sensors operate on 0-1 volt... wideband operates on 0-5 volt ... I don't know that the PCM is setup to handle the extra voltage on those pins internally....
Originally Posted by patSS/00
thinking about using the EGR pintle position input (since my EGR is gone). Someone in an older thread about this said that the sampling rate of the AC sensor is low
Kevin
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
Also, does anyone know where I can buy a 5-pin shrouded male connector that fits the EGR harness?
Kevin
Originally Posted by LS1PoweredZ28
Is the EGR position input a 0-5V source? Do you happen to have the link to the older thread talking about this?
Kevin
Kevin
old thread
And yes it's 0-5V. One of the wires is a 5V reference from the PCM.
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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.
