4. Installation
4.1 Mounting the sensor
On non-catalytic converter vehicle:
After the instrument is calibrated, and the vehicle's engine is warmed up, readings can be taken
from the engine’s exhaust. A probe clamp is required if the vehicle will be in motion (not just on
the dyno), and is recommended even when the vehicle is stationary. The oxygen sensor needs to
have the back part of the sensor (where the wires enter the sensor) exposed to outside air to
yield the most accurate results.
On catalytic converter equipped vehicles:
For those vehicles it is typically necessary to have a qualified muffler shop install a second
oxygen sensor bung upstream from the catalytic converter (included). The wide-band oxygen
sensor will be installed there. Plug the sensor bung when not in use (plug included). The sensor
must be installed in the exhaust pipe at the side or in the top.
Do NOT install it below the 3 o'clock or 9 o'clock position. Condensation
can form in the exhaust pipe and permanently damage the sensor
.
On turbo charged vehicles:
Install the sensor 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.
Wide band oxygen sensors – like the one shipped with the LM-1 -- cannot
tolerate leaded gasoline and will be permanently damaged after a short period of
use. Do NOT use the LM-1 with engines that burn leaded gasoline.
WHEN INSTALLED IN THE EXHAUST, THE OXYGEN SENSOR
MUST BE CONNECTED AND OPERATING WITH THE LM-1
WHENEVER THE CAR IS RUNNING. UN UN-POWERED OXYGEN
SENSOR WILL BE QUICKLY DAMAGED WHEN EXPOSED TO HOT
EXHAUST GASES.
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