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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,565
As I mentioned before, the original sensor isn't WBO2 sensor. Narrow band just flips from 0.3V to 1.4V around lambda 1.0 and is completely different design. Electronics will modulate control pressure in order to oscillate around this lambda signal threshold on part throttle and they will ignore it on full throttle. Once full throttle switch is on, CIS "mechanics" decide how much fuel goes into cylinders. You will never find a turbocharged car with narrow bands lambda sensor that runs closed loop at full throttle. Not a single one.

Bosch LSU 4.2 (wideband sensor which they will probably use) should not be mounted on turbo/pressure side. And should not be mounted with bung pointing downwards.

On TURBO CHARGED vehicles:
Bung: Install the bung downstream from the turbo before the catalytic
converter. The high exhaust pressure before the turbo interferes with
the lambda measurement and the high exhaust temperatures
encountered there can damage the sensor.

# Sensors should be placed so they are not overheated (gas temp not above 750 C, nor cooled beyond the ability of the heater to maintain their working temperature (~10 Watts).
# All pump cell wideband sensors are pressure sensitive. They should not be placed where the working gas pressure is much above or below atmospheric pressure, otherwise different calibration curves must be used for best accuracy.
Good luck with your car. I won't bother you with more posts.

kind regards,
Thank you for your time,

Last edited by beepbeep; 11-07-2009 at 03:09 AM..
Old 11-07-2009, 02:42 AM
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