9.
Accumulation
of
moisture,
dirt
or
oil, on
the
distributor
cap,
wires
or
spark
plugs.
10.
Cracked
distributor
cap
or
rotor.
The
difficulty
may
be
located
by
the
following
procedure.
When
the
engine
is
being
cranked
with
the
ignition switch on
and
all
other
electrical
equipment
off, a slight intermittent
discharge
should show
on
tbe
ammeter.
If
such a
discharge
does
not show, look for diffi-
culties
covered
by
items 1, 2,
3,
4
and
5.
If
a continuous
discharge
shows
and
the
distributor points
are
breaking,
the
condenser
is
shorted
and
should
be
replaced.
If
the intermittent
discharge
shows, items 7
and
8 should
be
checked
by
pulling
the
large
wire
running from
the
coil to the distributor out
of
the
distributor
cap,
then holding
the
end
of
the
wire
about
1,4
in.
from
the
cylinder
block while
the
engine
is
being
cranked
with
the
ignition switched
on.
If
the
spark
does
not jump
that
gap,
the coil
is
faulty.
If
spark
is
being
delivered
to
the
distributor
cap,
items 9
and
10
should
be
checked.
The
spark
timing
can
be
checked
by
the
pro-
cedure
outlined
under
the electrical system for setting ignition timing.
If
the distributor
shaft
or
gear
is
broken, the distributor rotor
will
not turn when
the
engine
is
cranked.
See
"The Electrical System"
for
timing instructions.
OCCASIONAL
OR
REPEA
TED
ENGINE
MISS
If
a
miss
occurs
in
one
or
more cylinders while
accelerating
or
at
high
engine
speeds,
the
difficulty
is
more
than
likely
due
to
faulty
ignition
in
which
case
the
procedure
given
under
"If the Engine Stops
or
Fails to
Start"
should
be
followed
and
the
spark
plugs should
be
carefully
ch~cked
in
accordance
with instructions
given
in
the
elec-
trical section
of
this manual.
If
the
engine
momentarily
ceases
to fire on all cylinders when
accelerating
or
at
high
speeds,
the
difficulty
may
be
caused
by
a
loose
or
broken
electrical connection
or
by
a
restricted
flow
of
fuel
through the
carburetor.
(See "Fuel Pump",
page
44,
for
information
on cleaning
the
fuel filter.) A
miss
which occurs only
at
idling
or
slow
engine
speed
when the throttle
is
nearly
closed would
indicate
im-
proper
mixture'
of
fuel
and
air,
improperly
adjusted
spark
plug
gaps
or
insufficient compression.
(See
page
43
for
carburetor
adjust-
ments.)
If
adjusting
the
idling fuel
and
air
mixture
does
not eliminate
the
difficulty,
the
cylinder
in
which
the
miss
occurs
can
be
deter-
mined
by
using a screw
driver
with
an
insulated
handle
to short
42
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