- E -

EFE-PTC

Early fuel evaporation-positive temperature coefficient.

EFE-PVS

Early fuel evaporation-ported vacuum switch.

EFE-TVS

Early fuel evaporation-thermal vacuum switch.

EFE-TVV

Early fuel evaporation-thermal vacuum valve.

EFE-VSV

Early fuel evaporation-vacuum switching valve.

Effective Bits

A measure of a digital oscilloscope's ability to accurately reconstruct a sign wave signal's shape. This measurement compares the oscilloscope's actual erroe to that of a theoretical ideal digitizer.

Efficiency

The output of energy divided by the input of energy, expressed in percentage.

EFI

Electronic fuel injection.

EFI-MA

Electronic fuel injection-mass airflow.

EFM

Electronic fuel monitoring.

Egg Crate

A cross-hatch grille design.

EGI

Electronic Gasoline Injection

EGO

Exhaust gas oxygen.

EGOG

EGO signal return with separate grounds on the engine block.

EGR

An acronym for exhaust gas recirculation.

EGR System

An EGR valve, mounted on the intake manifold, that meters a small amount of exhaust gas into the intake manifold to dilute the air/fuel mixture. This keeps combustion temperatures below 2,500 degree F and reduces the formation of Nox. The amount of exhaust gas reticulated into the engine is only a few percent.

EGR Valve

An acronym for exhaust gas recirculation valve.

EGR Valve-position Sensor

A potentiometer that keeps the engine control computer informed relative to the EGR valve position.

EGR-BPBV

Exhaust gas recirculation-bypass back pressure valve.

EGR-BPV

Exhaust gas recirculation-bypass valve.