MSPNP 99-00 o2 wiring
#1
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Hi All,
I have one of the new MSPNP9900 for my 99 miata. I installed it and got it running so that was good. I then installed the LC-1 along with a VEI gauge. I have programmed both LC-1 outputs with the same 7.35-22.39 settings. My VEI gauge is working great. The MS either does not see the wbo2 voltage or something. I changed the profile info to wideband, I reset the AFR table to LC-1 and I changed the EGO to wideband as well.
Do I need to wire the wideband to one of the alternative o2 inputs? If so, which pin is it because I cannot find any info on the pinouts for the 15 pin connector?
Oh, I did ground to the ecu ground and I am getting what looks to be the proper voltage (2.3-2.5v) going to the ecu via the O2 sensor connector and original harness.
Thanks
Chris
Edit: I found the MSPNP general manual and it shows pin 14 to be the right one but I want to make sure that it applies to this new model.
I have one of the new MSPNP9900 for my 99 miata. I installed it and got it running so that was good. I then installed the LC-1 along with a VEI gauge. I have programmed both LC-1 outputs with the same 7.35-22.39 settings. My VEI gauge is working great. The MS either does not see the wbo2 voltage or something. I changed the profile info to wideband, I reset the AFR table to LC-1 and I changed the EGO to wideband as well.
Do I need to wire the wideband to one of the alternative o2 inputs? If so, which pin is it because I cannot find any info on the pinouts for the 15 pin connector?
Oh, I did ground to the ecu ground and I am getting what looks to be the proper voltage (2.3-2.5v) going to the ecu via the O2 sensor connector and original harness.
Thanks
Chris
Edit: I found the MSPNP general manual and it shows pin 14 to be the right one but I want to make sure that it applies to this new model.
Last edited by fmcokc; 08-20-2012 at 11:33 AM. Reason: found new info
#5
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Pretty sure you have to set them differently...like this:
Attachment 52508
Attachment 52508
Last edited by fmcokc; 08-20-2012 at 11:34 AM. Reason: i am a moron
#6
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I'm just going to quote this:
Place a jumper between "O2 Select" and "Front" to connect the front OE O2 sensor the the MSPNP. Likewise, connect the jumper between "O2 Select" and "Rear" to connect the front OE O2 sensor.
#7
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OK, so I went ahead and stuck the wideband sensor wire to the #14 pin on the 15 pin connector and shazzam it works. Lesson learned-the MSPNP likes to see the wideband through the alt. input port.
The gauge and the wideband are reading slightly different AFR's though ( .3 higher on the MS). How does one tell which is correct? They are both set to the same scales and seeing the same voltage for what I can tell.
I saw a thread on adjusting the voltages using the AFR calibration tool. Which voltages would you correct though?
Thanks
Chris
The gauge and the wideband are reading slightly different AFR's though ( .3 higher on the MS). How does one tell which is correct? They are both set to the same scales and seeing the same voltage for what I can tell.
I saw a thread on adjusting the voltages using the AFR calibration tool. Which voltages would you correct though?
Thanks
Chris
#8
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There's been 3-4 posts within the last month or two about this issue, with a bunch of additional info.
#9
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The gauge is correct. The MS shows a different value because there's a discrepancy due to differing grounds. You need to either use the same ground as the ECU for the gauge, or play with the custom wideband values until they line up.
There's been 3-4 posts within the last month or two about this issue, with a bunch of additional info.
There's been 3-4 posts within the last month or two about this issue, with a bunch of additional info.
#10
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Pretty sure you have to set them differently...like this:
Attachment 52508
Attachment 52508
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