Wideband and MS2 Reading Different AFRs?
 

hey all

I just finally got my MS2 installed on my 95 Miata, i was playing with it in tunerstudio to learn to tune and i noticed that the AFR on my wideband is different from the AFR displayed in Tunerstudio(10.8 on windeband and 12ish on tunerstudio). has anyone encountered this before? im running a bran new innovate mtx l plus, MS2PNP, and the GM AIT. other then that the car is currently stock. I'm just trying to figure out the MS before I order a turbo.

second question, All the research and videos ive watched have been on a 1.6. I noticed on the 1.8 i have tube comming off the intake just before the throttle body, going into what looks like a valve or sensor.(in pic below) my question is what is it? what issues will i encounter when i turbo? can i delete it or do i have to add a bung to the intake tubing to keep it?


thanks

https://cimg7.ibsrv.net/gimg/www.mia...af94ea4971.jpg

Is the Wideband grounded at the same spot as the ECU? Grounding offsets are often the cause of mismatched signals. First step is to try to get a clean ground, then next step is to recalibrate the sensor in TunerStudio to account for the grounding offset.

That's the idle air control valve. Put a bung on the turbo piping.

Thanks!!! The wideband is grounded off the engine ground beside the intake manifold, which from what i remember reading was recommend, now, i did share the ground with the boost gauge, would the cause any issues? as for the ECU, its using whatever ground is in the factory wiring.. i will have to find a wiring diagram to find out for sure where its grounded to.