P 3500 V8-6.5L DSL Turbo VIN F (1998)
Turbo Boost Sensor: Description and Operation
Boost (BARO) Sensor
The boost sensor measures the changes in the intake manifold pressure. The boost sensor converts the engine load and the speed changes, then converts
the change in readings to the voltage output.
The PCM sends a 5 volt reference signal to the boost sensor. As the manifold pressure changes, the electrical resistance of the boost sensor also changes.
By monitoring the sensor output voltage, the PCM detects the boost pressure. A high pressure (high voltage) requires more fuel. A lower pressure (low
voltage) requires less fuel. The control module uses the boost pressure signal in order to control the fuel delivery.
The boost sensor is also used for the BARO readings only on the vehicles that are not equipped with an EGR. This sensor reads the barometric pressure
(BARO) under certain conditions, which allows the PCM to automatically adjust for different altitudes.
