F 350 4WD Pickup V8-7.3L DSL (1988)
Ported EGR Valve
(2)
Ported EGR Valve - Operated by a vacuum signal from the carburetor EGR port. The port signal actuates the valve diaphragm. As vacuum
increases, spring pressure is overcome, opening the valve and allowing EGR flow. The amount of flow is dependent upon the position of the
tapered pintle or poppet whose position reflects the strength of the vacuum signal.
Electronic EGR Valve
(3)
Electronic EGR Valve - EGR valve used in EEC systems where EGR flow is controlled by the ECA, by means of a EGR valve position (EVP
) solenoid attached to the valve. Operating vacuum is supplied by EGR solenoid valve(s).
Valve and Transducer Assembly
(4)
Valve and Transducer Assembly - This component consists of a modified ported EGR valve and a remote transducer. This assembly operates the
same as the Integral Backpressure Transducer EGR valve and is used on some 2.0L and 2.3L gasoline engines.
EGR Valve Position Sensor
EGR VALVE POSITION SENSOR (EVP) - Potentiometric Sensor or its signal line used in electronically controlled EGR systems. Sensor wiper
position is proportional to EGR Valve pintle position. This allows the electronic control assembly (ECA) to determine actual EGR flow at any point in
time.
EGR VENT SOLENOID (EGRV) - Electrical solenoid or its control line. Solenoid normally vents EGRC vacuum line. When EGRV is energized,
EGRC can open EGR valve.
