Glossary “fatigue” Definition:
Tendency of a material to break under conditions of repeated stressing considerably below its tensile strength.
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fatigue failure
Glossary “fatigue failure” Definition:
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
Glossary “fatigue strength” Definition:
Measurement of a material’s resistance to fatigue. Ability of a bearing to withstand the loads placed on it.
fast burn
Glossary “fast burn” Definition:
Using high compression and swirl, the rapid combustion of an A/F mixture.
fast flush
Glossary “fast flush” Definition:
Special machine to clean the cooling system by circulating a cleaning solution.
fast idle
Glossary “fast idle” Definition:
Higher speed, 1,100 to 1,500 rpm, at which an engine idles during cold start and warm-up, when first started.
fast idle cam
Glossary “fast idle cam” Definition:
A cam-shaped lever on the carburetor or throttle body that provides fast-idle action when the engine is cold.
fanning
Glossary “fanning” Definition:
Use of pressurized air through a spray gun to facilitate drying, a practice not recommended.
FANSS
Glossary “FANSS” Definition:
Fan Speed Sensor Signal Displays as RPM.
FANSSM
Glossary “FANSSM” Definition:
Variable Speed Fan Hall Sensor Input
FANVARF
Glossary “FANVARF” Definition:
Variable Speed Fan Output Fault Displays Yes/No.
farad (F)
Glossary “farad (F)” Definition:
Basic unit for capacitance. A capacitor has a value of one farad when it has stored one coulomb of charge at one volt. Named for Michael Faraday (1791-1867)
Faraday
Glossary “Faraday” Definition:
Michael Faraday (1791-1867) is credited with the discovery of electromagnetic induction.
fan clutch
Glossary “fan clutch” Definition:
Device installed between the water-pump pulley and fan of an engine-driven fan that is reacts in response to engine speed and underhood temperature.
fan hub
Glossary “fan hub” Definition:
Mounting surface for the fan.
fan shroud
Glossary “fan shroud” Definition:
Plastic or metal housing inside which the fan rotates; on certain vehicles, allowing all of the air flow to past through the radiator finned tubing and prevents air recirculation.
FANDC
Glossary “FANDC” Definition:
Variable Speed Fan Duty Cycle
fan belt
Glossary “fan belt” Definition:
Flexible V-,or flat poly-grove-type drive belt that transfers power from the crankshaft pulley to the water pump and/or accessories, such as the alternator.
fan blade
Glossary “fan blade” Definition:
Four or more blades on the fan, usually spaced unevenly to reduce vibration and noise.
false air
Glossary “false air” Definition:
Air entering the intake system that is unmetered, or air that is delivered upstream of the O2 sensor during CL operation.