2003 JEEP GRAND CHEROKEE Fuel pump replace

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Page 399 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual The ignition system is controlled by the powertrain
control module (PCM) on all engines.
The ignition system consists of:
²Spark Plugs
²Ignition Coil(s)
²Powertrain Control Module (PCM)
²Crankshaf

Page 406 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (14) If a plus (+) or a minus (-) is displayed next to
degree number, and/or the degree displayed is not
zero, loosen but do not remove hold-down clamp bolt.
Rotate oil pump drive until IN RANGE appea

Page 1247 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - PERFORMANCE
ENGINE PERFORMANCE DIAGNOSIS CHART
CONDITION POSSIBLE CAUSES CORRECTION
ENGINE WILL NOT CRANK 1. Weak or dead battery 1. Charge/Replace Battery.

Page 1248 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CONDITION POSSIBLE CAUSES CORRECTION
3. Worn or incorrect gapped spark
plugs3. Clean plugs and set gap. (Refer to
8 - ELECTRICAL/IGNITION
CONTROL/SPARK PLUG -
CLEANING).
4. Dirt or water in fuel syste

Page 1256 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual INSTALLATION
CAUTION: When installing the engine into a vehicle
equipped with an automatic transmission, be care-
ful not to damage the trigger wheel on the engine
flywheel.
(1) Attach a lifting devic

Page 1263 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual (2) Drain the coolant (Refer to 7 - COOLING -
STANDARD PROCEDURE) and disconnect the hoses
at the engine thermostat housing and the water
pump inlet. DO NOT waste reusable coolant. If the
solution is

Page 1264 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CLEANING
Thoroughly clean the engine cylinder head and cyl-
inder block mating surfaces. Clean the intake and
engine exhaust manifold and engine cylinder head
mating surfaces. Remove all gasket materi

Page 1300 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual INSTALLATION
A gear-type oil pump is mounted at the underside
of the cylinder block opposite the No.4 main bearing.
(1) Install the oil pump on the cylinder block using
a replacement gasket. Tighten t
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