F
FAST-IDLE CAM - Cam used in the carburetor linkage to hold the throttle valve open for a fasterthan-normal idle speed when the engine is cold.
FEEDBACK CARBURETOR ACTUATOR (FBCA) - Controls carburetor air/fuel ratio. A system of fuel control employing a computer controlled stepper motor that varies the carburetor fuel/air mixture.
FEEDBACK CARBURETOR ACTUATOR MOTOR:
FEEDBACK CARBURETOR ACTUATOR MOTOR - A component of the Carburetor Feedback Control System used on the 7200 model carburetor. The actuator motor is threaded into the carburetor body and its actuator shaft moves a fuel metering pintle valve to produce a richer or leaner air/fuel mixture at the carburetor. The actuator shaft moves in and out in response to an electronic signal coming from the Exhaust Gas Oxygen (EGO) sensor and conditioned by the EEC or MCU system. (See illustration at top of next column)
FEEDBACK CARBURETOR SYSTEM (FBC)- system of fuel control employing a computer controlled stepper motor that varies the carburetor fuel/air mixture.
FEEDBACK SOLENOID - Pulsing solenoid which introduces fresh air from the air cleaner into the idle and main system vacuum passages to lean the air/fuel mixture.
FLOAT CONTROLLED FUEL INLET SYSTEM:
FLOAT - (1) A hollow metal or plastic component in the carburetor that operates the inlet valve through which fuel flows from the fuel pump into the float bowl. (2) The hollow or buoyant of the fuel-level sensor in the fuel tank.
FLOAT BOWL - A chamber in the carburetor containing a fuel reserve from which fuel is drawn during the fuel-intake process. Fuel level in bowl is controlled by the float.
FLOAT BOWL VENTS:
FLOAT BOWL EXTERNAL VENT - Openings in the float bowl connected to the evaporative emission control system which prevents excessive pressure from forming in the float bowl and vents vapors to the canister.
FLOAT BOWL VENTS:
FLOAT BOWL INTERNAL VENT - Opening in the float bowl connected to the carburetor air inlet which maintains float bowl pressure to that of carburetor air inlet pressure.
FLOAT LEVEL - Fuel level in a float bowl as maintained and regulated by a float.
FLOODING - A situation in which the air/fuel mixture is too rich to allow easy combustion. This condition leads to a coating of raw fuel on spark plug electrodes and makes starting difficult.
FUEL CHARGING MANIFOLD ASSEMBLY:
FUEL CHARGING MANIFOLD ASSEMBLY- Assembly which incorporates four or more injectors, a pressure regulator, a throttle air bypass valve, a throttle body assembly, a twopiece air intake manifold and a fuel supply manifold assembly.
FUEL CONTROL SOLENOID (FCS) - Controls the carburetor air/fuel ratio by one of two methods:
(1) A pulsating, "duty cycle" solenoid that "bleeds" air into the "main" and "idle" fuel system.
(2) A "duty cycle" solenoid which includes a vacuum regulator/diaphragm that controls fuel flow in the "main" fuel system and "bleeds" air into the "idle" fuel system.
FUEL DECEL VALVE (FDV) - A valve which, during deceleration, adds additional air/fuel to the intake manifold to enrich the air/fuel mixture and thus provide for more complete combustion.
FUEL EVAPORATION HEATER-SWITCH:
FUEL EVAPORATION HEATER-SWITCH (EFE) - A heater-switch assembly mounted upside down at the rear of the engine manifold. The purpose of the switch is to control a relay and heater element in the early fuel evaporation system (EFE) based on engine temperature. The normally closed switch will activate the relay and heater at low engine temperature to prevent fuel puddling in the intake manifold. The switch will open the control relay shutting off the EFE heater when the engine has warmed up.
FUEL INJECTION - Fuel system in which the carburetor is replaced by jets that inject fuel directly into the cylinders at intake ports, or into a throttle body that is mounted on the intake manifold (replacing the carburetor).
FUEL INJECTOR:
FUEL INJECTOR - A solenoid operated valve that meters fuel flow to the engine. The injector is opened and closed a constant number of times per crank revolution. The amount of fuel is controlled by the length of time it is held open.
FUEL INJECTOR:
The injector is normally closed and is operated by a signal from the Electronic Engine Control (EEC) module.
FUEL PRESSURE REGULATOR:
FUEL PRESSURE REGULATOR - Component used in the EFI system that is attached to the fuel supply manifold upstream of the injectors. It regulates the fuel pressure supplied to the injectors.
FUEL PRESSURE TAP - Point in the fuel system where pressure is monitored.
FUEL PUMP RELAY (FP) - Relay or its control line. Relay is controlled by ECA processor. Supplies power to electric fuel pump of EFI/CFI system.
FUEL-RICH, LEAN - A qualitative evaluation of air/fuel ratio based on the voltage from the exhaust gas oxygen (EGO) sensor. If there is an excess of oxygen (EGO voltage .4 volt), the mixture is said to be "lean" and if there is insufficient oxygen (EGO voltage .6 volt), the mixture is said to be "rich'
FUEL SUPPLY MANIFOLD ASSEMBLY - Component which delivers high pressure fuel from the vehicle fuel supply line to the four injectors.
FUEL SYSTEM - All the components, from the fuel tank to the intake manifold, that handle the storage and delivery of fuel in a car.
FUEL VACUUM SEPARATOR:
FUEL VACUUM SEPARATOR - Used to filter waxy hydrocarbons from carburetor ported vacuum to protect the vacuum delay valve and distributor vacuum controls.