We bought Emu black ecu for my friend’s project car. For testing I connected it to my car, updated firmware and loaded my configuration file. With this new ecu lambda reading around 20 to 25 percent richer. I am using the internal wideband controller on the emu black and using bosch lsu 4.9 sensor. only difference is this new emu black using type c connection and my 6 months old emu black is micro usb.Is the new emu black reading the right value or the old one ?
You may be have older emu black who needed resistor for lambda, if you have it remove, but only if you will leave new emu black with usb c in that car.
Do I need a Resistor for LSU 4.2 and Black without USb-c ?
Wideband readings where always strange, the reading startet late, even with fast heatup…
Doesnt need a resistor. The sensor is heated up according the Bosch documentation to protect the sensor. It takes quite a long time.
There is an option to calibrate the WBO circuit. You need to disconnect the sensor and select the Calibrate WBO from TOOLS menu. It improves the readings around lambda 1.0.
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This is my ecu with micro usb version O it does not need a resistor as the info
Or type c version have a problem reading rich ?
Type c ecu have a version of R
The resistor doesn’t influence the lambda readings.
Try to disconnect the sensor and make calibration. Maybe there was made calibration with connected sensor.
Each device before shipment is tested and the test results are written to the database. So we can always check the test results based on the device serial number. Of course the device needs to pass all test to get the serial number sticker.
For confirmation electrically disconnecting o2 sensor not free air calibration.