SLC OEM crazy linear output, even after HW calibration

[Maxime Gabay]

Good evening gents,

I have this MX5 to tune.

It is equipped with a Speeduino ECO, and an SLC OEM lambda controler and an LSU 4.9.

Initially, it was reading very rich : 10 AFR instead of 14.

I changer the sensor for a brand new one : same story.

I put custom WB calibration values in TunerStudio : 0v/10AFR and 5v/20AFR.

Same result.

Then i did a hardware calibration : ground pin 11, power up, wait 10sec, probe the linear output : it was giving 4.86V, meaning calibration is a success.

Remove the short, power up again. Same weird AFR.

The AFR value is moving when i apply throttle. It just seems to have this crazy offset.

I am at a loss here.

Any help would be greatly appreciated.

Thank you.

Max