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-
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:
The sensors that monitor one or more of these systems include: