Trying to use a WB o2 with the EGR input
04-12-2008, 06:12 PM
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Trying to use a WB o2 with the EGR input I'm trying to hook up my wideband o2 sensor and read it via HPtuners.
I wired the O2 sensor into the EGR position into the ECU (slot 55 on blue connector)
I went into HPtuner editer and enabled the EGR function and set the min. speed to 0. So the computer should now be reading the "EGR voltage" correct?
Then I went into VCM scanner and made a custom PID to tell me what the EGR voltage is. I left the sensor drop down menu blank, Units is V, and then typed in [PID.2811]
So this should give me strictly what the WB sensor is reading as a voltage. Well when I turn on the car, that box displays " <unsupported parameter> ". Don't know what that means.
BTW, the WB o2 sensor is putting out a signal of about 2.5V as read on my DMM.
Thanks for the help
I wired the O2 sensor into the EGR position into the ECU (slot 55 on blue connector)
I went into HPtuner editer and enabled the EGR function and set the min. speed to 0. So the computer should now be reading the "EGR voltage" correct?
Then I went into VCM scanner and made a custom PID to tell me what the EGR voltage is. I left the sensor drop down menu blank, Units is V, and then typed in [PID.2811]
So this should give me strictly what the WB sensor is reading as a voltage. Well when I turn on the car, that box displays " <unsupported parameter> ". Don't know what that means.
BTW, the WB o2 sensor is putting out a signal of about 2.5V as read on my DMM.
Thanks for the help
04-12-2008, 07:45 PM
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Have you looked at this thread: https://ls1tech.com/forums/pcm-diagnostics-tuning/451779-hooking-up-wb-another-sensor-egr-read-into-hpt.html
Under Configure User Defined Parameters, I have:
Name: Wideband (EGR)
Abbrv: WB EGR
Sensor: Air Fuel Ratio
Units: afr
Function: [PID.2811]/.5+10
Under Configure User Defined Parameters, I have:
Name: Wideband (EGR)
Abbrv: WB EGR
Sensor: Air Fuel Ratio
Units: afr
Function: [PID.2811]/.5+10
04-13-2008, 03:54 AM
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yep,
I initially made the custom parameter just like you have (but with a LC-1....slightly different equation) it was reading "7.35" afr which relates to 0 Volts. That's when I checked the voltage output of the O2 sensor with my DMM and was getting ~2.5 volts.
That's when I made the PID to read just EGR voltage, and got the error message above.
I initially made the custom parameter just like you have (but with a LC-1....slightly different equation) it was reading "7.35" afr which relates to 0 Volts. That's when I checked the voltage output of the O2 sensor with my DMM and was getting ~2.5 volts.
That's when I made the PID to read just EGR voltage, and got the error message above.
04-13-2008, 01:29 PM
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Did you make sure that you connected to the correct wire position on the ECU? (sometimes the wiring diagrams change between different model years and types of vehicles) I didn't think that any of the Corvettes had EGR, so maybe the EGR wiring is not active?
04-13-2008, 11:16 PM
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I figured it out. All of the instructions that I read basically said "oh yeah, make sure you log the EGR voltage". So I just made a PID that was just [PID.2811]. So this morning I was reading over some more instructions that stated it just ever so slightly different and the light bulb came on. You go into Engine>Emissions and log EGR position that is already in there. So now it works!
