Pontiac Fiero 1988 Service Manual page 418

IGNITION SYSTEM 6D4-5
-•4- Install or Connect
NOTICE:
If a new module is to be installed, a
package of silicone grease will be included with it.
Spread the grease on the metal face of the module
and on the distributor base where the module
seats. This grease is necessary for module cooling.
1. Module.
2. Module leads (observe color code).
3. Attaching screws to module.
4. Rotor.
5.
Cap.
Pick-Up Coil
1. Remove distributor from car and follow
instructions in Unit Repair, as applicable.
Rotor
% 1
1. Remove distributor cap.
2. The rotor is retained by two screws and is
provided with a slot which fits over a square lug,
so that the rotor can be installed in only one
position.
Integral Ignition Coil
J4"»|
Remove or Disconnect
1.
2.
1.
2.
3.
Distributor cap.
Three coil cover attaching screws, and lift off
cover.
Coil attaching screws and lift ignition coil and
leads from cap.
Install or Connect
Coil and attaching screws.
Coil leads.
Coil cover and attaching screws.
Capacitor
Fig. 1
The capacitor is part of the coil wire harness
assembly. Since the capacitor is used only for radio
noise suppression, it will seldom need replacement.
4~*| Remove or Disconnect
Distributor cap and rotor.
Capacitor attaching screw and unplug connector
from module. It may help to loosen the module.
Install or Connect
Plug into module.
Capacitor and hold-down screw (be sure ground
lead is under screw).
L
2.
H > < H
1.
2.
3. Rotor and cap.
Set Ignition Timing
1. Refer to the tune-up label located in the engine
compartment. Follow all instructions on the
label.
2. With ignition off, connect the pick-up lead of
timing light to the number one spark plug. Use
a jumper lead between the wire and plug, or an
inductive type pick-up. DO NOT pierce the wire,
or attempt to insert a wire between the boot and
the wire. Connect the timing light power leads
according to manufacturer's instructions.
3. Start the engine and aim the timing light at the
timing mark. The line on the balancer or pulley
will line up at the timing mark. If a change is
necessary, loosen the distributor hold-down
clamp bolt at the base of the distributor. While
observing the mark with the timing light, slighty
rotate the distributor until the line indicates the
correct timing. Tighten the hold-down bolt and
re-check the timing.
4. Turn off the engine and remove the timing light.
Reconnect the number one spark plug wire, if
removed.
Spark Plug Wires
Use care when removing spark plug wire boots
from spark plugs. Twist the boot 1/2 turn before
removing and pull on the
boot only
to remove the
wire.
When replacing plug wires, route the wires
correctly and through the proper retainers. Failure to
route the wires properly can lead to radio ignition noise
and crossfiring of the plugs, or shorting of the leads to
ground.
Special care should be exercised when reinstalling
spark plug boots, to assure that the metal terminal
within the boot is fully seated on the spark plug
terminal and that the boot has not moved on the wire.
If boot to wire movement has occurred, the boot will
give a false visual impression of being fully seated. A
good check to assure that boots have been properly
assembled is to push sideways on the installed boots.
If they have been correctly installed, a stiff boot, with
only slight looseness, will be noted. If the terminal has
not been properly seated on the spark plug, only the
resistance of the rubber boot will be felt when pushing
sideways.
Distributorless Ignition
The distributorless ignition system consists of the
following serviceable components.
1. Coil pack - Service as a complete unit (see On-Car
Service).
2. Ignition module - Service as a complete unit (see
On-Car Service).
3. Hall effect sensor(s) - Service as a complete unit
(see On-Car Service).
4. ECM (see Section 6E3).