(3) Use an ohmmeter to check cables for opens,
loose terminals or high resistance.
(a) Remove cable from spark plug.
(b) Remove cable from the coil tower.
(c) Connect the ohmmeter between spark plug
end terminal and the coil end terminal. Resistance
should be within tolerance shown in the cable re-
sistance chart. If resistance is not within tolerance,
replace cable assembly. Test all spark plug cables
in same manner.
SPARK PLUG SERVICE
When replacing the spark plug cables, route the ca-
bles correctly and secure them in the appropriate re-
tainers. Failure to route the cables properly can
cause the radio to reproduce ignition noise, cross ig-
nition of the spark plugs or short circuit the cables to
ground.
SPARK PLUG REMOVAL
Always remove the spark plug cable by grasping at
the spark plug boot, turning the boot 1/2 turn and
pulling straight back in a steady motion.
(1) Prior to removing the spark plug spray com-
pressed air around the spark plug hole and the area
around the spark plug.
(2) Remove the spark plug using a quality socket
with a rubber or foam insert.
(3) Inspect the spark plug condition. Refer to
Spark Plug Condition in this section.
SPARK PLUG GAP ADJUSTMENT
Check the spark plug gap with a gap gauge. If the
gap is not correct, adjust it by bending the ground
electrode (Fig. 7).
SPARK PLUG INSTALLATION
(1) To avoid cross threading, start the spark plug
into the cylinder head by hand.
(2) Tighten spark plugs to 28 NIm (20 ft. lbs.)
torque.
(3) Install spark plug cables over spark plugs. On
3.5L engines, ensure the top of the spark plug insu-
lator seals the upper end of the spark plug tube.
SPARK PLUG TUBES—3.5L ENGINE
On 3.5L engines, the spark plugs thread into the
top of cylinders. Tubes isolate the spark plugs and
cables. For spark plug tube service, refer to Group 9,
Engines.
THROTTLE BODY MINIMUM AIR FLOW
Refer to the General Diagnosis section of Group 14.
IGNITION TIMING PROCEDURE
The 3.3L and 3.5L engines use a fixed ignition sys-
tem. The PCM regulates ignition timing. Basic igni-
tion timing is not adjustable.
CAMSHAFT POSITION SENSOR—3.3L ENGINE
The camshaft position sensor is mounted in the
front of the timing case cover (Fig. 8).
REMOVAL
(1) Disconnect electrical connector from sensor.
(2) Loosen camshaft position sensor screw.
(3) Without pulling on the connector wires, pull
the sensor up out of the chain case cover.
CABLE RESISTANCE CHART
Fig. 7 Setting Spark Plug Gap—Typical
Fig. 8 Camshaft Position Sensor Location
IGNITION SYSTEMS 8D - 13
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