2002 JEEP GRAND CHEROKEE ENGINE CONTROL

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Page 1301 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual (3) Install intake manifold on the cylinder head
dowels.
(4) Install washer and fastener Numbers 1, 2, 4, 5,
8, 9, 10 and 11 (Fig. 84).
(5) Install washer and fastener Numbers 6 and 7
(Fig. 84).
(6) T

Page 1308 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual DIAGNOSIS AND TESTING - ENGINE DIAGNOSIS - PERFORMANCE
CONDITION POSSIBLE CAUSE CORRECTION
ENGINE WILL NOT START 1. Weak battery 1. Charge or replace as necessary.
2. Corroded or loose battery
connect

Page 1309 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual CONDITION POSSIBLE CAUSE CORRECTION
1. ENGINE MISSES ON
ACCELERATION1. Spark plugs dirty or incorrectly
gapped.1. (Refer to 8 - ELECTRICAL/
IGNITION CONTROL/SPARK PLUG -
CLEANING).
2. Dirt in fuel sys

Page 1311 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual CONDITION POSSIBLE CAUSES CORRECTION
OIL PRESSURE DROP 1. Low oil level. 1. Check and correct oil level.
2. Faulty oil pressure sending unit. 2. Replace sending unit (Refer to 9 -
ENGINE/LUBRICATION/O

Page 1315 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual (13) Disconnect the engine block heater power
cable from the block heater.
(14) Lower vehicle.
(15) Remove throttle body resonator assembly and
inlet hose.
(16) Disconnect throttle and speed control c

Page 1316 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual (32) Disconnect body ground strap at the right side
cowl.
NOTE: It will be necessary to support the transmis-
sion in order to remove the engine.
(33) Position a suitable jack under the transmis-
sion

Page 1317 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual ²Camshaft Position (CMP) Sensor
²Coil Over Plugs
(10) Install generator (Refer to 8 - ELECTRICAL/
CHARGING/GENERATOR - INSTALLATION).
(11) Install radiator (Refer to 7 - COOLING/EN-
GINE/RADIATOR -

Page 1318 of 2199

JEEP GRAND CHEROKEE 2002 WJ / 2.G Workshop Manual DESCRIPTION SPECIFICATION
PISTON RINGS
Ring Gap
Top Compression Ring 0.37 - 0.63 mm
(0.0146 - 0.0249 in.)
Second Compression
Ring0.37 - 0.63 mm
(0.0146 - 0.0249 in.)
Oil Control (Steel Rails) 0.25 - 0