ENGINE DIVISION SERVICE MANUAL
Connect timing light to No. 1 spark plug (No. 8
spark plug on V-304, V-345, V-392 engines).
Do not puncture high tension cables or boots to
make contact. Use proper adapters. (Figure 44)
Operate engine at idle speed and observe timing
marks with timing light. Rotate distributor housing as
needed to align timing mark on crankshaft pulley with
specified initial timing mark on timing quadrant
(Figure 45). When timing is correct, tighten
distributor hold down bolt and recheck timing to be
sure it did not change.
Disconnect timing light and connect vacuum hose to
distributor advance unit (where equipped).
Fig. 45. Timing Marks (V-304, V-345, V392 Engines
1. Timing quadrant
2. Timing mark
IGNITION SYSTEM TROUBLE SHOOTING TEST
The procedure outlined below can be used to check
operation of the electronic (breakerless) ignition system.
Electrical components (coil and electronic control unit) are not
repairable. If the operation test indicates that they are faulty,
The following equipment is required to make the
D. C. Voltmeter
Insulated grippers for handling high tension cables.
Extension (adapter) to plug into high tension cable
Test Battery Voltage.
Using voltmeter, test battery (Figure 46) voltage
should be 12-13 volts for a fully charged battery. If
necessary, charge or replace battery.
Fig. 46. Testing Battery Voltage
2. Ignition switch
4. Ignition coil
CGES-145-U Page 23
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