jeff_man

iTrader: (7)

MegaSquirtPNP Pro MM9900

I'm reviewing the manual to see where my Uego signal wire goes but I can't figure it out. The back plug diagram does not show anything related to wideband or o2. The #2 expansion plug does have 2B Oxygen Sensor but I don't have a plug that fit it.

So A I'm missing something or B I need to get a plug that fits the #2 female hole.




Bonus question - What is the best power and group wire to splice into so that the AFR in tuner studio matches the gauge? With past ECUs they have always been slightly off each other.

18psi

iTrader: (76)

pnp pro?

jeff_man

iTrader: (7)

Updated OP

MegaSquirtPNP Pro MM9900

18psi

iTrader: (76)

check my thread re: pnp pro bro

jeff_man

iTrader: (7)

I'm still stupid or that post is not applicable. He is running/asking about a MS2 not a MS3. My last ECU (RIP) was just AEM white wire to MS harness wide band wire
I'm guessing it analog 1 or 2 and I have to set it up in tuner studio but can't find a confirmation or where in TS to do it.

Edit - pnp pro bro is talking about him not getting the AFR correction right. I have or had a good correction but was still slightly off and want to use a better power/ground in hopes to get it more matching reading. I am stuck at hooking up the white wire to the MSPNP Pro.

18psi

iTrader: (76)

https://www.miataturbo.net/megasquir...utotune-83467/

Matt Cramer

Use Analog In 2 and set the O2 input pin to this in TunerStudio.

jeff_man

iTrader: (7)

Thanks 18

Thanks Matt.

Anything on using splicing into the same power/ground the ECU is using to helping get the gauge and ECU to show a more consistent AFR? Old MS2 and gauge was .25 to .5 off each other with correction put into tuner studio.

Matt Cramer

If the wideband has only one ground, ground it to the same place as the ECU.

If it has a differential output with both a + and - connection, ground the - to the sensor ground on the MSPNP.