A three dimensional map held in a microprocessor that provides an optimum set of values for the control of ignition timing, ignition dwell period and fuel quantities for all engine operating conditions.

Provides information on engine speed to engine management systems (transducer).

A bar that is used to support an engine, for example, after the transmission has been removed.

Engine temperature sender unit for temperature gauge and engine management systems (thermistor).

The amount of turning force produced by an engine. Usually quoted at a set speed.

Process of increasing the mixture strength / reducing the air fuel ratio.

European Onboard Diagnostics

EOS Exhaust Oxygen Sensor. Provides information to the fuel system ECU on the oxygen content in the exhaust gas. Also EGO Exhaust Gas Oxygen Sensor, HEGO Heated Exhaust Gas Oxygen Sensor and Lambda sensor.

Environmental Protection Agency

See Epicyclical Gearing.