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I'm looking for the rear Oxygen Sensor specifications :
after the catalytic converter
it gives the A/F (Air Fuel Ratio) and good or bad catalytic converter
it detects the oxygen concentration in the exhaust gas
a high voltage --> car rich (<14,7 AFR)
a low voltage --> car lean (>14,7 AFR)
with model ??? LM1 ?? bosh ???
I know :
- it's a 4 wire sensor :
A : Y (Yellow)
B : BR (Brown)
C : W/R (White / Red)
D : R (Red)
- when you check the voltage ; at 3000 rpm should should have 0,5- 0,7 V ; under accelerated you should have 0,5-1,0 V and under decelerated : 0-0,5 V
take + to A and - to B --> Voltage
- you should have a 14,1-18,9 Ohms resistance under 68°F (20°C) : conditions for the sensor to work fine
take C and D --> ohms
anybody check the voltage after putting a midpipe ???
By putting the correct resistance you can perhaps avoid the cat cel ?????
need some help
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Fraid it's not that simple. The PCM does a test cycle...and it expects both sensors to react in a certain manner. Since the WB02 is current based...and the narrow band...voltage based...you will have a devil of a time fooling it.
The output the sensor sends is "spikes" or clicks of voltage, increasing in frequency as the mixture gets leaner.
So you would need a fooler circuit that sends regular pulses, like the ones they use to fool Subies and Mitsus, but when the ECU sends a check of rich/lean mixture, it expects both sensors to react, and no fooler ever could.