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Fatigue

The tendency of a material to break under conditions of repeated stressing considerably below its tensile strength.

Fatigue Failure

Metal failure due to repeated stress so that the character of the metal is altered and it cracks. This is a condition that frequently causes engine bearing failure due to excessive engine idling or slow engine-idling speed.

Fatigue Strength

The measure of a material's resistance to fatigue.

FBC

Feed back carburetor or feed back control.

FBCA

Feed back carburetor actuator.

FBVA

Fuel bowl vent actuator.

FBVS

Fuel bowl vent solenoid.

FBVV

Fuel bowl vent valve.

FC

Fan control.

FCM

Acronym for Front Control Module (Chrysler).

FCOS

Fuel cut-off solenoid.

FCS

Feedback control solenoid or fuel control solenoid or fuel compensation sensor.

FDV

Forward delay valve.

Fe

Iron An element with the atomic number of 26.

Featheredge

The technique of blending the repair of a damaged area into the undamaged area, maintaining the original surface texture and sheen.

Feathering

The technique of modulating the throttle lightly and smoothly for precise, controlled changes in engine speed.

Featherweight Leaf Spring

A fiber composite spring.

Feature Car

A vehicle displayed at a car show for appearance money and not trophy competition.

FEC

Fuel evaporation control.

Federal Version

A car that meets the United States' exhaust emission standards, but not California's standards.