3000GT AWD V6-2972cc 3.0L DOHC Turbo (1991)
A richer A/F mixture equates to a higher voltage (approx. 1 volt).
A leaner A/F mixture equates to a lower voltage (approx 0.1 volt).
Catalytic Converter Performance
The ECU interprets the voltage change as the stoichiometric point and will attempt to control the injector duration, ignition timing and several other
systems to maintain that condition.