2003 JEEP GRAND CHEROKEE Intake

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Page 2158 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)

Page 2162 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)

Page 2166 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)

Page 2167 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (M)Malfunction Indicator Lamp (MIL) illuminated during engine operation if this DTC was recorded
(depending if required by CARB and/or EPA). MIL is displayed as an engine icon on instrument panel.
(G)

Page 2179 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual EVAPORATIVE EMISSIONS
TABLE OF CONTENTS
page page
EVAPORATIVE EMISSIONS
DESCRIPTION
DESCRIPTION - EVAPORATION CONTROL
SYSTEM............................24
DESCRIPTION - CCV SYSTEM...........25
DESCRIP

Page 2181 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual ²a PCV valve mounted to the oil filler housing
(Fig. 3). The PCV valve is sealed to the oil filler
housing with an o-ring.
²the air cleaner housing
²two interconnected breathers threaded into the
r

Page 2182 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual During periods of high manifold vacuum, such as
idle or cruising speeds, vacuum is sufficient to com-
pletely compress spring. It will then pull the plunger
to the top of the valve (Fig. 6). In this p

Page 2183 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CCV HOSE
DIAGNOSIS AND TESTING - CCV SYSTEM -
4.0L
Before attempting diagnosis, be sure locations of
fixed orifice fitting and air inlet fitting (Fig. 8) have
not been inadvertently exchanged. The fix