Engine Emission Control; Positive Crankcase Ventilation; Exhaust Gas Re-Circulation - Ford 2002 Bantam Workshop Manual

303-08B-215
DESCRIPTION AND OPERATION

Engine Emission Control

Item Description
1 Exhaust manifold to exhaust gas
Recirculation (EGR) valve tube
2 EGR vacuum regulator solenoid
3 EGR valve

Positive Crankcase Ventilation

The positive crankcase ventilation system
recycles crankcase gases back through the
engine where they mix with the incoming air
charge. All the combustion gases, which enter
the crankcase, flow through hoses out of the
valve cover into the intake air system. It is a
completely sealed system, which helps to reduce
hydrocarbon emissions from the engine.
E7849 EN
Engine Emission Control — Diesel Engine

Exhaust Gas Re-circulation

The exhaust gas re-circulation system reduces
the formation of NOx (oxides of nitrogen) by
recycling measured quantities of exhaust gas
back through the engine where they mix with the
incoming air charge.
The exhaust gas re-circulation vacuum regulator
solenoid is controlled by the powertrain control
module with ground pulses. This regulates the
amount and duration of the signal supplied to the
exhaust gas re-circulation valve and therefore the
valve lift and opening times are controlled.
303-08B-215
09/2001 2002 Bantam