Chevrolet 1963 Corvette, Руководство по ремонту и настройке, Страница: 304 / 346

TROUBLESHOOTING 283
Section 4—Secondary Electrical System
See Chapters 2-3 for service" procedures
Test'and Procedure Results and Indications
Proceed
to
4.1 —Check for spark: Hold each spark
plug wire approximately %" from
ground with gloves or a heavy, dry
rag. Crank the engine, and ob-
serve the spark.
If no spark is evident:
If spark is good in some cylinders:
If spark is good in all cylinders:
4.2 4.3
4.6
Check for spark at the plugs
4.2—Check for spark at the coil high
tension lead: Remove the coil high
tension lead from the distributor
and position it approximately Vi"
from ground. Crank the engine
and observe spark.
CAUTION:
This test should not be performed
on engines equipped with elec-
tronic ignition.
If the spark is good and consistent: 4.3
If the spark is good but intermittent, test the
primary electrical system starting at 3.3: 3.3
If the spark is weak or non-existent, replace
the coil high tension lead, clean and tighten
all connections and retest. If no improvement
is noted:
4.4
4.3—Visually inspect the distributor
cap and rotor for burned or cor-
roded contacts, cracks, carbon
tracks, or moisture. Also check the
fit of the rotor on the distributor
shaft (where applicable).
If moisture is present, dry thoroughly, and
retest per 4.1: 4.1
If burned or excessively corroded contacts,
cracks, or carbon tracks are noted, replace
the defective part(s) and retest per 4.1:
4.1
If the rotor and cap appear intact, or are only
slightly corroded, clean the contacts thor
oughly (including the cap towers and spark
plug wire ends) and retest per 4.1:
If the spark is good in all cases:
4.6
If the spark is poor in all cases: 4.5
HIGH RESISTANCE
CARBON
ROTOR TIP \
BURNED AWAY
Inspect the distributor cap and rotor
CORRODED OR
LOOSE WIRE