Oxygen sensor against Injector signal (petrol)
Volt division oxygen sensor : 0.5 Volts
Volt division Injector : 20 Volts
Time division : 5 mili seconds
When the O2 sensor voltage increase the ECU would see this as a rich mixture and to counter this decrease the dwell time (opening time) of injectors so less fuel is being injected( injectors staying open) and the mixture would become leaner
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