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In order to meet Federal Exhaust Emission
and Fuel Economy regulations, today's
vehicles are equipped with highly
sophisticated electronic engine control
systems. These systems do not require
periodic adjustments. The only services
required on a scheduled basis are spark plug
and filter replacement. Tune-ups, as we knew
them, are no longer necessary.
Engine Control Computer
The computer receives information from a
network of sensors and switches that convert
engine operating conditions into electrical
signals. Based on the information and
instructions stored in the computer program,
commands are then sent to three primary
systems:
- Ignition System
- Fuel System
- Emission Control System
The sensors that monitor one or more of
these systems include
- Mass Airflow Sensor
- Throttle Position Sensor
- Manifold Absolute Pressure Sensor
- Coolant Temperature Sensor
- Exhaust Oxygen Sensor
- Crankshaft Position Sensor
- Camshaft Position Sensor
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Engine Diagram
- Mass Airflow Sensor
- Throttle Position Sensor
- Manifold Absolute Pressure Sensor
- Coolant Temperature Sensor
- Exhaust Oxygen Sensor
- Crankshaft Position Sensor
- Camshaft Position Sensor
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