Tps @ Wot

[Mark]

Ok. Here's the deal. I have an Autometer Wideband A/F meter. It has the capability to trap the leanest A/F when at wide open throttle. The way they suggest is having a normally open switch that goes closed at WOT, bringing the meter's trigger to ground.

Is there any such signal in a Miata?

[chuckerants]

Stupid question: Do you have a Wideband O2 sensor?

[Mark]

Yes. Wideband O2 sensor installed just a few inches down from the factory O2...