having a crappy ignition system can cause super rich condition
the O2 sensor monitors oxygen. any gas not burned/mixed and ignited correctly will of course flow out the exhaust where the o2 will see it.
Except the ecu thinks the extra air means that the motor is running lean, so dumps more gas into the cylinder
Buy new NGK copper core plugs from your local partsstore, and test your plug wires to make sure thay are making proper resistance.
You want as little resistance as possible, so test the wires and post the resistance valvue
I think the rule of thumb is 12k ohms per foot or less
the O2 sensor monitors oxygen. any gas not burned/mixed and ignited correctly will of course flow out the exhaust where the o2 will see it.
Except the ecu thinks the extra air means that the motor is running lean, so dumps more gas into the cylinder
Buy new NGK copper core plugs from your local partsstore, and test your plug wires to make sure thay are making proper resistance.
You want as little resistance as possible, so test the wires and post the resistance valvue
I think the rule of thumb is 12k ohms per foot or less