S300 AFR stuck at 16.28 (not live)

[Halfmasteg]

Hi all, starting to tune my hatch myself turbo b series

Having trouble getting my AEM gauge to sync with my Smanager. I have the 12V red wire wired to the fuse box, after searching on this forum I decided to relocate my ground to the thermostat housing alongside my CPR and engine harness. White is to D14 everything WAS working normal, I noticed that the AFR was different from the gauge to smanager came to find out about the brown wire, wired that to one of the two black wires from the ecu (OBD1 P28) (A23/24) and ever since then the AFR in smanager has been stuck on lean gauge works fine but smanager is stuck lean. I then relocated the brown wire to one of the sensor grounds instead of ecu ground (D21) and still same thing happened gauge works smanager doesn’t. When I wired these two connections I first wired it in conjunction to the harness realized that didn’t work and cut the wire from the harness side to see if it would work then that procedure didn’t work for either pinout. At a loss not sure what to do feel like I’ve checked everything it was literally just working hope I didn’t fry anything or wire something wrong. Also disconnected the brown wire completely again and it’s still lean lol no idea what I did probably did some damage

Attached is the calibration

Hatch Tune 1.s3d

[TTR]

I usually attach the brown wire to D22. Use D10 ELD for the white wire and remove R136 and R138 inside the ecu. This works 99.9% of the time unless something is wrong with the ecu.

[Halfmasteg]

I’ll try this after work thanks for the tip!

[Halfmasteg]

Update:

Tried relocating to ELD also cut resistors from the ecu still not getting an accurate reading I’ve noticed I’m only getting about 0.5v from my white signal wire from the aem x gauge not sure if this is a gauge issue or maybe something else

[Spunkster]

If you are not getting the proper voltage from the wideband controller, then you may need to contact the manufacturer of the wideband.