I have a 2003 NB everything engine related stock apart from LC2 wideband and MS3PNP.

I installed the LC2 sensor and controller prior to MS3PNP. I ran the simulated narrow band and ground to the stock O2 harness, and the 0-5v output to the gauge face. As far as I could tell the gauge / sensor / controller were all working. Reading around 14.7 at idle and richer under heavy throttle.

I then installed MS3PNP, took the 0-5v output from the LC2 and fed it into the stock O2 harness, cutting and capping the narrowband output. Tunerstudio read a constant 7.8. I checked and rechecked all my connections. I recalibrated the sensor before and after this step.

I then tried plugging the wideband output directly into MS via the options port on the rear. I plugged into pin c - analog in 2 (http://www.megasquirtpnp.com/docs/ms....php?isModel=1). Still reading full rich.

In tuner studio I have my AFR calibration set to LC2 (also tried custom with the voltage mapping from LC2 install manual). I have my EGO port = Analog In 2, sensor type = wideband.

I just checked the wideband output with a multimeter with the ignition on and engine off and got a reading around 12v which doesn't make sense to me either.

If I can ever figure this out, maybe I can actually tune my idle and keep the car running :(

Any advice would be greatly appreciated!

 

I’m having the same issue. Did you figure it out?