1996 CHRYSLER VOYAGER spark plugs

TORQUE CHART 2.4L
DESCRIPTION TORQUE
Balance Shaft Carrier to Block
Bolts.....................54N´m(40ft.lbs.)
Balance Shaft Gear Cover
Double Ended Fastener......12N´m(105 in. lbs.)
Balance Shaft Sprockets
Bolts....................28N´m(250 in. lbs.)
Balance Shaft Chain Tensioner
Bolts....................12N´m(105 in. lbs.)
Balance Shaft Carrier Cover
Fasteners................12N´m(105 in. lbs.)
Camshaft Sensor Pick Up
Bolts.....................27N´m(20ft.lbs.)
Timing Belt Cover
Outer to Inner Attaching Bolts M6.......4.5 N´m
(40 in. lbs.)
Inner Cover to Head/Oil Pump Bolts M6 . . .12 N´m
(105 in. lbs.)
Camshaft Sprocket
Bolt.....................101 N´m (75 ft. lbs.)
Connecting Rod Cap
Bolts..............................27N´m
(20 ft. lbs.) Plus 1/4 Turn
Crankshaft Main Bearing Cap/Bedplate
M8 Bedplate Bolts.........34N´m(250 in. lbs.)
Main Cap Bolts M11..................41N´m
(30 ft. lbs.) Plus 1/4 Turn
Crankshaft Damper
Bolt....................135 N´m (100 ft. lbs.)
Cylinder Head
Bolts........Refer To Cylinder Head Installation
Cylinder Head Cover
Bolts....................12N´m(105 in. lbs.)DESCRIPTION TORQUE
Engine Mount Bracket
Bolts.....................61N´m(45ft.lbs.)
Engine MountÐFront and Rear
Through Bolt...............61N´m(45ft.lbs.)
Exhaust Manifold to Cylinder Head
Bolts....................23N´m(200 in. lbs.)
Exhaust Manifold Heat Shield
Bolts....................12N´m(105 in. lbs.)
Front Torque BracketÐ2.0/2.4L Engine
Bolts.....................33N´m(24ft.lbs.)
Front Torque Bracket StrutÐ2.0/2.4L Engine
Long Bolts................110N´m(80ft.lbs.)
Short Bolt.................61N´m(45ft.lbs.)
Intake Manifold
Bolts.....................27N´m(20ft.lbs.)
Oil Filter
Filter.....................20N´m(15ft.lbs.)
Oil Pan
Oil Pan Bolts.............12N´m(105 in. lbs.)
Drain Plug.................27N´m(20ft.lbs.)
Oil Pump Attaching
Bolts....................28N´m(250 in. lbs.)
Oil Pump Cover Fastener. . . .12 N´m (105 in. lbs.)
Oil Pump Pick-up Tube Bolt . .28 N´m (250 in. lbs.)
Oil Pump Relief Valve Cap. . . .41 N´m (30 ft. lbs.)
Rear Torque Bracket
Bolts....................110N´m(80ft.lbs.)
Spark Plugs
Plugs.....................28N´m(20ft.lbs.)
Thermostat Housing
Bolts....................23N´m(200 in lbs.)
Timing Belt Tensioner Assembly
Bolts.....................61N´m(45ft.lbs.)
Water Pump Mounting
Bolts....................12N´m(105 in. lbs.)
NS2.4L ENGINE 9 - 57
SPECIFICATIONS (Continued)

Service Limit.............0.15 mm (0.006 in.)
Valve Guide
Overall Length±Intake........44mm(1.732 in.)
Overall Length±Exhaust.......48mm(1.889 in.)
Outside Diameter...........13.055 - 13.065 mm
(0.514 - 0.5143 in.)
Inside Diameter..............8.000 - 8.018 mm
(0.314 - 315 in.)
Valve Springs
Free Length (Approx.).......49.8 mm (1.960 in.)
Service Limit............48.8 mm (1.9213 in.)
Loaded Height...............40.4 mm @ 33 kg
(1.59 in. @73 lbs.)
Perpendicularity±Intake and Exhaust . . .2É (Max.)
Service Limit.....................4É(Max.)
Oil Pump
Clearance Over Rotors (Max.) .0.077 mm (0.003 in.)
Cover Out-of-Flat (Max.).....0.076 mm (0.003 in.)
Inner Rotor Thickness (Min.) .18.92 mm (0.744 in.)
Outer Rotor (Oil Pump)
Clearance (Max.)...........0.19 mm (0.007 in.)
Diameter (Min.)...........82.45 mm (3.246 in.)
Thickness (Min.)...........18.92 mm (0.744 in.)
Tip Clearance Between Rotors (Max.) . . .0.150 mm
(0.0068 in.)
Oil Pressure
At Curb Idle Speed*...........68.9 kPa (10 psi)
At 3000 rpm.........310 - 517 kPa (45 - 75 psi)
CAUTION: * If pressure is ZERO at curb Idle, DO
NOT run engine at 3,000 rpm.
TORQUE CHART 3.0L
DESCRIPTION TORQUE
Camshaft Bearing Cap
Bolts. . .Refer to procedure outlined in this section.
Camshaft Sensor Pick Up
Bolts.....................27N´m(20ft.lbs.)
Timing Belt Cover
Outer to Inner Attaching Bolts..........4.5 N´m
(40 in. lbs.)
Inner Cover to Head/Oil Pump Bolts.....12N´m
(105 in. lbs.)
Camshaft Sprocket
Bolt......................95N´m(70ft.lbs.)
Connecting Rod Cap
Bolts..........27N´m(20ft.lbs.) Plus 1/4 Turn
Crankshaft Main Bearing Cap/Bedplate
M8 Bedplate Bolts.........34N´m(250 in. lbs.)
M11 Main Cap Bolts..................41N´m
(30 ft. lbs.) Plus 1/4 Turn
Crankshaft Vibration Damper
Bolt....................135 N´m (100 ft. lbs.)DESCRIPTION TORQUE
Cylinder Head
Bolts........Refer To Cylinder Head Installation
Cylinder Head Cover
Bolts....................12N´m(105 in. lbs.)
Engine Mount Bracket
Bolts.....................41N´m(30ft.lbs.)
Engine MountÐFront and Rear
Through Bolt...............61N´m(45ft.lbs.)
Exhaust Manifold to Cylinder Head
Bolts....................23N´m(200 in. lbs.)
Exhaust Manifold Heat Shield
Bolts....................12N´m(105 in. lbs.)
Intake Manifold
Bolts.....................27N´m(20ft.lbs.)
Oil Filter to Engine Block Adapter
Bolts.....................55N´m(40ft.lbs.)
Oil Filter
Filter.....................20N´m(15ft.lbs.)
Oil Pan
Oil Pan Bolts.............12N´m(105 in. lbs.)
Drain Plug.................39N´m(29ft.lbs.)
Oil Pump Attaching
Bolts....................15N´m(130 in. lbs.)
Oil Pump Cover Fastener.....9N´m(104 in. lbs.)
Oil Pump Pick-up Tube Bolt . .28 N´m (250 in. lbs.)
Oil Pump Relief Valve Cap. . . .49 N´m (36 ft. lbs.)
Spark Plugs
Plugs.....................28N´m(20ft.lbs.)
Thermostat Housing
Bolts....................23N´m(200 in lbs.)
Timing Belt Tensioner
Bolt......................28N´m(20ft.lbs.)
Timing Belt Tensioner Pulley Assembly
Bolt......................41N´m(30ft.lbs.)
Water Pump Mounting
Bolts....................12N´m(105 in. lbs.)
9 - 90 3.0L ENGINENS
SPECIFICATIONS (Continued)

NOTE: Worn valve guides or cocked springs are
sometimes mistaken for noisy tappets. If such is
the case, noise may be dampened by applying side
thrust on the valve spring. If noise is not apprecia-
bly reduced, it can be assumed the noise is in the
tappet. Inspect the rocker arm push rod sockets
and push rod ends for wear.
Valve tappet noise ranges from light noise to a
heavy click. A light noise is usually caused by exces-
sive leak-down around the unit plunger which will
necessitate replacing the tappet, or by the plunger
partially sticking in the tappet body cylinder. A heavy
click is caused either by a tappet check valve not
seating, or by foreign particles becoming wedged
between the plunger and the tappet body causing the
plunger to stick in the down position. This heavy
click will be accompanied by excessive clearance
between the valve stem and rocker arm as valve
closes. In either case, tappet assembly should be
removed for inspection and cleaning.
CHECKING ENGINE OIL PRESSURE
Check oil pressure using gauge at oil pressure
switch location. Oil pressure should be 34.47 kPa (5
psi.) at idle or 205 to 551 kPa (30 to 80 psi.) at 3000
RPM.
(1) Remove pressure sending unit and install oil
pressure gauge (Fig. 5).
CAUTION: If oil pressure is 0 at idle, do not run
engine at 3000 RPM.
(2) Warm engine at high idle until thermostat
opens.
SERVICE PROCEDURES
VALVE TIMING
(1) Remove front cylinder head cover and all 6
spark plugs.
(2) Rotate engine until the #2 piston is at TDC of
the compression stroke.
(3) Install a degree wheel on the crankshaft pulley.
(4) With proper adaptor, install a dial indicator
into #2 spark plug hole. Using the indicator find TDC
on the compression stroke.
(5) Position the degree wheel to zero.
(6) Remove dial indicator from spark plug hole.
(7) Place a 5.08 mm (0.200 in.) spacer between the
valve stem tip of #2 intake valve and rocker arm pad.
Allow tappet to bleed down to give a solid tappet
effect.
(8) Install a dial indicator so plunger contacts the
#2 intake valve spring retainer as nearly perpendic-
ular as possible. Zero the indicator.
(9) Rotate the engine clockwise until the intake
valve has lifted .254 mm (0.010 in.).
CAUTION: Do not turn crankshaft any further
clockwise as intake valve might bottom and result
in serious damage.
(10) Degree wheel should read 6 degrees BTDC to
6 degrees ATDC.
MEASURING TIMING CHAIN FOR STRETCH
(1) Place a scale next to timing chain so that any
movement of chain may be measured.
(2) Place a torque wrench and socket on camshaft
sprocket attaching bolt and apply torque in direction
of crankshaft rotation to take up slack; 41 N´m (30 ft.
lb.) with cylinder head installed or 20 N´m (15 ft. lb.)
with cylinder heads removed.With a torque
applied to the camshaft sprocket bolt, crank-
shaft should not be permitted to move. It may
be necessary to block crankshaft to prevent
rotation.
(3) Holding a scale even, with dimension reading
as shown (Fig. 6), along edge of chain links. Apply
torque in the reverse direction to 41 N´m (30 ft. lbs.)
with cylinder heads installed, or 20 N´m (15 ft. lbs.)
with cylinder heads removed. Check amount of chain
movement.
(4) Install a new timing chain, if its movement
exceeds 3.175 mm (1/8 inch).
(5) If chain is not satisfactory, refer to Timing
Chain Removal and Installation in this section.
Fig. 5 Checking Oil Pump Pressure
9 - 96 3.3/3.8L ENGINENS
DIAGNOSIS AND TESTING (Continued)

(4) Remove upper intake manifold. Refer to Group
11, Exhaust System and Intake Manifolds for proce-
dure.
(5) Remove cylinder head covers and spark plugs.
(6) Remove electrical connector from ignition coils.
(7) Using suitable socket and flex handle at crank-
shaft pulley retaining screw, turn engine so the num-
ber 1 piston is at Top Dead Center on the
compression stroke.
(8) Remove rocker arms with rocker shaft and
install a dummy shaft. The rocker arms should not
be disturbed and left on shaft.
(9) With air hose attached to spark plug adapter
installed in number 1 spark plug hole, apply 90 to
100 psi air pressure (620.5 to 689 kPa). This is to
hold valves in place while servicing components.
(10) Using Tool C-4682 or equivalent, compress
valve spring and remove retainer valve locks and
valve spring.
(11) The intake valve stem seals should be pushed
firmly and squarely over the valve guide using the
valve stem as guide.Do Not Forceseal against top
of guide. When installing the valve retainer locks,
compress the springonly enoughto install the
locks.
CAUTION: Do not pinch seal between retainer and
top of valve guide.
(12) Follow the same procedure on the remaining 5
cylinders using the firing sequence 1-2-3-4-5-6.Make
sure piston in cylinder is at TDC on the valve
spring that is being covered.
(13) Remove spark plug adapter tool.
(14) Remove dummy shaft and install rocker shaft
assembly and tighten screws to 28 N´m (250 in. lbs.).
(15) Install cylinder head covers tighten screws to
14 N´m (120 in. lbs.) and electrical connector to igni-
tion coils.
(16) Install Intake Manifold. Refer to Group 11,
Exhaust System and Intake Manifold for procedure.
(17) Connect negative cable to battery.
CYLINDER HEAD COVER
REMOVAL
NOTE: The cylinder head cover can be either an
isolated type (Fig. 32) or a non-isolated type.
FRONT CYLINDER HEAD COVER
(1) Disconnect ignition cables from spark plugs.
(2) Disconnect crankcase vent hose from cylinder
head cover.
(3) Remove front cylinder head cover bolts.
(4) Remove cylinder head cover and gasket.REAR CYLINDER HEAD COVER
(1) Disconnect negative cable from battery.
(2) Remove Wiper Unit. Refer to Group 8K, Wind-
shield Wipers and Washers for procedure.
(3) Remove intake manifold upper plenum. Refer
to Group 11, Exhaust System and Intake Manifold
for procedure.
(4) Disconnect PCV hose from cylinder head cover.
(5) Remove rear cylinder head cover bolts
(6) Remove cylinder head cover and gasket.
INSTALLATION
FRONT CYLINDER HEAD COVER
(1) Clean cylinder head and cover mating surfaces.
Inspect cylinder head cover surface for flatness.
Replace gasket as necessary.
(2) Install cylinder head cover and bolts.
(3) Tighten cylinder head cover bolts to the follow-
ing specifications:
²Non±isolatedcylinder head cover to 12 N´m
(105 in. lbs.).
²Isolatedcylinder head cover to 10 N´m (90 in.
lbs.) (Fig. 32).
(4) Connect crankcase vent hose.
(5) Connect ignition cables to spark plugs.
REAR CYLINDER HEAD COVER
(1) Clean cylinder head and cover mating surfaces.
Inspect cylinder head cover surface for flatness.
Replace gasket as necessary.
(2) Install cylinder head cover and bolts.
(3) Tighten cylinder head cover bolts to the follow-
ing specifications:
Fig. 32 Cylinder Head CoverÐIsolated Type
NS3.3/3.8L ENGINE 9 - 107
REMOVAL AND INSTALLATION (Continued)

(7) Inspect push rods and replace worn or bent
rods.
(8) Install push rods, rocker arm and shaft assem-
blies with the stamped steel retainers in the four
positions, tighten to 28 N´m (250 in. lbs.) (Fig. 36).
(9) Place new cylinder head cover gaskets in posi-
tion and install cylinder head covers. Tighten to 12
N´m (105 in. lbs.).
INTAKE MANIFOLD SEALING
The intake manifold gasket is a one-piece stamped
steel gasket with a sealer applied from the manufac-
turer. This gasket has end seals incorporated with it.
WARNING: INTAKE MANIFOLD GASKET IS MADE
OF VERY THIN METAL AND MAY CAUSE PER-
SONAL INJURY, HANDLE WITH CARE.
(1) Clean all surfaces of cylinder block and cylin-
der heads.
(2) Place a drop (about 1/4 in. diameter) of Mopart
Silicone Rubber Adhesive Sealant or equivalent, onto
each of thefourmanifold to cylinder head gasket
corners (Fig. 37).
(3) Carefully install the intake manifold gasket
(Fig. 38). Torque end seal retainer screws to 12 N´m
(105 in. lbs.).(4) Install intake manifold and (8) bolts and torque
to 1 N´m (10 in. lbs.). Then tighten bolts to 22 N´m
(200 in. lbs.) in sequence shown in (Fig. 39). Then
tighten again to 22 N´m (200 in. lbs.). After intake
manifold is in place,inspect to make sure seals
are in place.Refer to Group 11, Exhaust System
and Intake Manifold to complete intake manifold
installation.
(5) Install exhaust manifolds and tighten bolts to
27 N´m (20 ft. lbs.) and nuts to 20 N´m (15 ft. lbs.).
(6) Adjust spark plugs to specification in Group 8,
Electrical Section and install the plugs.
VALVES AND VALVE SPRINGS
REMOVAL
(1) With cylinder head removed, compress valve
springs using Valve Spring Compressor Tool
C-3422-B with adapter 6412 as shown in (Fig. 40).
(2) Remove valve retaining locks, valve spring
retainers, valve stem seals and valve springs.
Fig. 36 Rocker Arm Shaft Retainers
Fig. 37 Intake Manifold Gasket Sealing
Fig. 38 Intake Manifold Gasket Retainers
Fig. 39 Intake Manifold Removal and Installation
NS3.3/3.8L ENGINE 9 - 109
REMOVAL AND INSTALLATION (Continued)

Valve Margin
Intake.....1.15 ± 1.48 mm (0.0452 ± 0.0582 in.)
Exhaust....1.475 ± 1.805 mm (0.058 ± 0.071 in.)
Valve Length (Overall)
Intake....114.69 ± 115.19 mm (4.515 ± 4.535 in.)
Exhaust . . 109.59 ± 110.09 mm (4.603 ± 4.623 in.)
Valve Stem Tip Height
Intake.......45.01 ± 46.07 mm (1.77 ± 1.81 in.)
Exhaust......43.51 ± 44.57 mm (1.71 ± 1.75 in.)
Stem Diameter
Intake.....5.934 ± 5.952 mm (0.234 ± 0.234 in.)
Exhaust....5.906 ± 5.924 mm (0.233 ± 0.233 in.)
Stem to Guide Clearance
Intake . . . 0.048 ± 0.066 mm (0.0018 ± 0.0025 in.)
Exhaust . 0.0736 ± 0.094 mm (0.0029 ± 0.0037 in.)
Max. Allowable Intake.....0.076 mm (0.003 in.)
Max. Allowable Exhaust....0.101 mm (0.004 in.)
Valve Springs
Free Length (Approx.)......44.4 mm (1.747 in.)
Nominal Force (Valve closed) . 91 N´m @ 39.8 mm
(67 ft. lbs. @ 1.57 in.)
Nominal Force (Valve open) . 239 N´m @ 32.6 mm
(176 lbs. @ 1.28 in.)
Installed Height..........40.18 mm (1.580 in.)
* SERVICE AS AN ASSEMBLY WITH ROCKER
ARM.
** ALL READINGS IN CRANKSHAFT DEGREES,
AT 0.5 mm (0.019 in.) OF VALVE LIFT.
TORQUE CHART 2.0L SOHC
DESCRIPTION...................TORQUE
Camshaft Sensor Pick Up
Bolts...................9.6N´m(85in.lbs.)
Camshaft Sprocket
Bolt....................115N´m(85ft.lbs.)
Connecting Rod Cap
Bolts.........27N´m(20ft.lbs.) Plus 1/4 Turn
CollarÐOil Pan to Transaxle
Step 1: Collar to Oil Pan Bolts . 3 N´m (30 in. lbs.)
Step 2: Collar to Transaxle
Bolts...................108N´m(80ft.lbs.)
Step 3: Collar to Oil Pan
Bolts....................54N´m(40ft.lbs.)
Crankshaft Main Bearing Cap/Bedplate
M8 Bedplate Bolts..........30N´m(22ft.lbs.)
M11 Main Cap Bolts........81N´m(60ft.lbs.)
Crankshaft Damper
Bolt...................142N´m(105 ft. lbs.)
Cylinder Head
Bolts.......Refer To Cylinder Head Installation
Cylinder Head Cover
Bolts...................12N´m(105 in. lbs.)
Engine Mount BracketÐRight
Bolts....................61N´m(45ft.lbs.)DESCRIPTION...................TORQUE
Engine Mounting
Bolts.......Refer to Engine Mount Installation
Exhaust Manifold to Cylinder Head
Bolts...................23N´m(200 in. lbs.)
Exhaust Manifold Heat Shield
Bolts...................12N´m(105 in. lbs.)
Intake Manifold
Bolts...................12N´m(105 in. lbs.)
Oil Filter Adapter
Fastener.................80N´m(60ft.lbs.)
Oil Filter.................20N´m(15ft.lbs.)
Oil Pan
Bolts...................12N´m(105 in. lbs.)
Drain Plug...............27N´m(20ft.lbs.)
Oil Pump Attaching
Bolts...................28N´m(250 in. lbs.)
Oil Pump Cover Fastener . . . 12 N´m (105 in. lbs.)
Oil Pump Pick-up Tube Bolt . 28 N´m (250 in. lbs.)
Oil Pump Relief Valve Cap . . . 41 N´m (30 ft. lbs.)
Rocker Arm Shaft
Bolts...................28N´m(250 in. lbs.)
Spark Plugs...............28N´m(20ft.lbs.)
Thermostat Housing
Bolts...................23N´m(200 in lbs.)
Timing Belt Cover
Bolts M6................12N´m(105 in. lbs.)
Timing Belt Mechanical Tensioner Assembly
Bolts...................28N´m(250 in. lbs.)
Timing Belt Hydraulic Tensioner
Pulley Bolt...............68N´m(50ft.lbs.)
Pivot Bracket Bolt..........31N´m(23ft.lbs.)
Tensioner Bolts............31N´m(23ft.lbs.)
Water Pump Mounting
Bolts...................12N´m(105 in. lbs.)
SPECIAL TOOLS
ENGINE 2.0L SOHC
Puller 1026
9 - 36 ENGINENS/GS
SPECIFICATIONS (Continued)

EXHAUST SYSTEM AND INTAKE MANIFOLD
CONTENTS
page page
GENERAL INFORMATION
CATALYTIC CONVERTERS................. 1
EXHAUST FLEX-JOINT COUPLING........... 2
EXHAUST GAS RECIRCULATION (EGR)....... 2
EXHAUST SYSTEM....................... 1
HEAT SHIELDS.......................... 2
DESCRIPTION AND OPERATION
INTAKE/EXHAUST MANIFOLDÐ2.4L ENGINE . . 3
INTAKE/EXHAUST MANIFOLDÐ3.0L ENGINE . . 3
INTAKE/EXHAUST MANIFOLDÐ3.3/3.8L
ENGINES............................. 3
DIAGNOSIS AND TESTING
EXHAUST SYSTEM....................... 3REMOVAL AND INSTALLATION
EXHAUST MANIFOLDÐ2.4L ENGINE........ 8
EXHAUST MANIFOLDÐ3.0L ENGINE....... 11
EXHAUST MANIFOLDSÐ3.3/3.8L ENGINE . . . 16
EXHAUST PIPES, MUFFLERS AND TAILPIPES . 4
INTAKE MANIFOLD LOWERÐ2.4L ENGINE.... 6
INTAKE MANIFOLDÐ3.0L ENGINE.......... 8
INTAKE MANIFOLDÐ3.3/3.8L ENGINE...... 12
UPPER INTAKE MANIFOLDÐ2.4L ENGINE.... 4
CLEANING AND INSPECTION
EXHAUST MANIFOLD.................... 17
INTAKE MANIFOLD...................... 17
SPECIFICATIONS
TORQUE CHART........................ 18
GENERAL INFORMATION
EXHAUST SYSTEM
The exhaust systems are produced in several con-
figurations, depending on engine and vehicle (Fig. 1).
AWD vehicles have a catalytic converter mounted
heat shield. The tailpipes, mufflers, and resonators
are tuned to each vehicle/powertrain combination.
CATALYTIC CONVERTERS
There is no regularly scheduled maintenance on
any Chrysler catalytic converter. If damaged, the con-
verter must be replaced.CAUTION: Due to exterior physical similarities of
some catalytic converters with pipe assemblies,
extreme care should be taken with replacement
parts. There are internal converter differences
required in some parts of the country.
The combustion reaction caused by the catalyst
releases additional heat in the exhaust system. Caus-
ing temperature increases in the area of the reactor
under severe operating conditions. Such conditions
can exist when the engine misfires or otherwise does
not operate at peak efficiency.Do notremove spark
plug wires from plugs or by any other means short
out cylinders of the exhaust system if equipped with
Fig. 1 Exhaust SystemÐTypical (All Vehicles)
NSEXHAUST SYSTEM AND INTAKE MANIFOLD 11 - 1

The injectors are positioned in the intake manifold
with the nozzle ends directly above the intake valve
port (Fig. 38).
The fuel injectors are operated by the PCM. They
are energized in a sequential order during all engine
operating conditions except start up. The PCM ini-
tially energizes all injectors at the same time. Once
PCM determines crankshaft position, it begins ener-
gizing the injectors in sequence.
The Automatic Shutdown (ASD) relay supplies bat-
tery voltage to the injectors. The PCM provides the
ground path for the injectors. By switching the
ground path on and off, the PCM adjusts injector
pulse width. Pulse width is the amount of time the
injector is energized. The PCM adjusts injector pulse
width based on inputs it receives.
IGNITION COILÐPCM OUTPUT
The coil assembly consists of independent coils
molded together (Fig. 39) or (Fig. 40) or (Fig. 41).
The coil assembly is mounted on the intake manifold.High tension leads route to each cylinder from the
coil. The coil fires two spark plugs every power
stroke. One plug is the cylinder under compression,
the other cylinder fires on the exhaust stroke. The
PCM determines which of the coils to charge and fire
at the correct time.
The Automatic Shutdown (ASD) relay provides bat-
tery voltage to the ignition coil. The PCM provides a
ground contact (circuit) for energizing the coil. When
the PCM breaks the contact, the energy in the coil
primary transfers to the secondary causing the
spark. The PCM will de-energize the ASD relay if it
does not receive the crankshaft position sensor and
camshaft position sensor inputs. Refer to Automatic
Fig. 37 Fuel Injector
Fig. 38 Fuel Injector LocationÐTypical
Fig. 39 Ignition CoilÐ2.4L
Fig. 40 Ignition CoilÐ3.0L
NSFUEL SYSTEM 14 - 45
DESCRIPTION AND OPERATION (Continued)