Manual

14
1.3.3. Inlet Air Temperature Sensor
The air temperature sensor is used to comp ensate for changes in air density due to air
temperature. Cold air is denser than warm air and therefore requires a greater volume of fuel
to maintain the same air/fuel ratio. This effect is most noticeable in forced induction engines.
The Haltech F10 will automatically comp ensate using the signal received from the air
temperature sensor.
The sensor should be mounted to provide the best representation of the actual temperature of
the air enterin g the combustion chamber, i.e. after any turbo or supercharger, and intercooler,
and as close to the head as possible. The sensor needs to be in the moving air stream to give
fast response times and reduce heat-soak effects.
Note: The Haltech air temp erature sensor will read temperatures up to 120° C
and temperatures above this will be interpreted as a fault condition. The air
temperature after some turbos and superchargers can exceed this. If this occurs
with your engine you should consider fitting an intercooler to reduce air
temperature and increase ch ar ge density . If this is not possible then the air
temperature sensor should be placed up stream of the turbo or sup ercharger to
monitor ambient air temp erature.
Once a suitable position has been located for the air temperature sensor a hole should be
drilled and tapp ed to accep t the sensor. Remove the manifold or in let tract from the engine
before machining the sensor mount. Do not allow any metal particles to enter the inlet
manifold of the engine as these will be drawn into the engine and damage it. Wash all
components before reassembly.