F 350 2WD Pickup V8-7.3L DSL (1988)
Fuel Evaporative System
EVAPORATIVE EMISSION SHED SYSTEM (EESS) - A system for containment of fuel vapors (evaporative emissions) introduced in 1978. Annual
improvements have modified this system.
EXHAUST GAS CHECK VALVE (EGC) - Allows thermactor air to enter exhaust manifold but prevents reverse flow in the event of improper operation
of other components.
Exhaust Gas Oxygen Sensor
EXHAUST GAS OXYGEN SENSOR (EGO) - Exhaust Gas Oxygen Sensor or its signal line. Sensor changes its output voltage as exhaust gas oxygen
content changes when compared to oxygen content of atmosphere. Constantly changing voltage signal is sent to the processor for analysis and adjustment
to the air/fuel ratio.
EXHAUST GAS OXYGEN SIGNAL RETURN (EGOR) - EGO signal return line with a ground on the engine block.
EXHAUST GAS RECIRCULATION (EGR) - A procedure where a small amount of exhaust gas is readmitted to the combustion chamber to reduce
peak combustion temperatures and thus reduce NO emissions.
EXHAUST HEAT CONTROL VALVE (HCV) - A valve which routes hot exhaust gases to the intake manifold heat riser during cold engine operation.
The valve can be thermostatically controlled, or vacuum operated. In EEC-IV this valve is controlled by the signal from the ECA.
EXHAUST VALVE POSITION SENSOR (EVP) - Potentiometric sensor or its signal line. Sensor wiper position is proportional to EGR valve pintle
position. This allows ECA to determine EGR flow at any point in time.
F
FAST CODES - Located at the very beginning of the self-test sequence, the ECA generates standard service codes at a rate about 100 times faster than
the star tester is able to read them.
FUEL PUMP MONITOR (FPM) - Input used to monitor the fuel pump electrical circuit.
FRESH AIR DUCT - Duct leading from the air inlet to the snorkel of the air cleaner. The duct conducts fresh, ambient air to the air cleaner. Also called
a "zip tube."
