8
The bung should always be welded before the Catalytic Converter.
Welding the bung after the catalytic converter will skew the readings
toward lean. The skew in readings will vary with engine load and the
efficiency of the catalytic converter.
Leaded fuel and two stroke applications will reduce the sensor’s life.
There are many other factors that dictate the sensor’s lifespan so it is
impossible to predict it’s total longevity.
Exhaust leaks, camshaft overlap, and open (shorty) exhausts will
cause false lean readings at light engine loads. Typically, once the
engine is under load and the exhaust gas volume increases, you will
see accurate readings.
When installed in the exhaust, the oxygen sensor must be connected
to a powered, functional MTX-L (no error codes) whenever the
engine is running. An un-powered sensor will be damaged in a short
period of time when exposed to exhaust gas.
Do not pre-warm the sensor before starting the engine, simply start
the engine as normal. Allowing the sensor to pre-warm before
starting the engine will increase the possibility of damaging the
sensor from shock-cooling.
The maximum temperature of the sensor at the bung (the sensor
mounting location) should not exceed 500
o
C or 900
o
F. If these
temperatures are exceeded in your application you should install the
Innovate Motorsports HBX-1 heat sink bung extender. (p/n 3729.)
As the O2 sensor measures the oxygen content of the exhaust
gas to provide an accurate O2 reading, even a small pin-hole
leak in a poorly welded sensor bung will effect the accuracy
and performance of your O2 sensor. Remember, any deviation from
the instructions provided for proper sensor installation will lead to
inaccurate O2 readings.
2.6.1 Sensor
Calibration
Once the unit has been wired and a suitable location has been found for both
the gauge and the sensor it is time to perform the sensor calibration.
Innovate Motorsports’ ‘Direct Digital’ wideband measurement principal allows
you to calibrate the sensor to compensate for sensor wear. This procedure
takes just a few moments and it will ensure the most accurate readings
throughout the oxygen sensor’s life. This procedure is required anytime a
NEW oxygen sensor is installed.
