Ford 1956 - Page 9

Section
1
Trouble
Shooting
(d)
If
the
above
steps
do not
correct the
condition,
check
the
compression
to determine if
it
is
satisfactory
and
check
the
intake
manifold
passages
for
obstructions.
(5)
ENGINE
MISSES
ERRATICALLY
AT
IDLE.
A
miss
of
this
type
may
be
caused
by
a
combination
of
things.
Check
the
following
in
sequence:
(a)
Carburetor,
including
choke
operation,
idle
mix
ture
setting,
and
fuel
level.
(b)
The
ignition
system,
starting
with
the
spark
plugs.
Make
the
necessary
repairs.
(c)
The
vacuum
lines and
fittings for
leaks.
Make
any
necessary
repairs.
(d)
Valve
operation.
Perform
a compression test
if
the
miss
persists.
Repair the
engine
as
necessary.
(6)
ENGINE
MISFIRES
OR
HESITATES
ON AC
CELERATION.
This malfunction
is
usually
a
combina
tion
of
faults
in
the ignition
and fuel
system,
but also
can
be
caused
by
the
exhaust system.
Check
the follow
ing
in
sequence.
(a)
Check
the operation of
the exhaust gas control
valve. If
it is
sticking,
free
it
up
or replace it
as
necessary.
(b)
Check
the
paint
on
the
intake manifold heat
riser
passage.
If
the
paint is not burned
off,
the
passage
may
be
obstructed
preventing
the carburetor
from
properly
vaporizing
the
fuel.
(c)
Remove
the
spark
plugs.
Inspect,
clean,
and
adjust
the
gap.
Replace
any
plugs
that
are
defective
or
lead-fouled.
(d)
Remove the distributor
cap,
and
check
the point
gap,
distributor shaft
clearance,
condition of
the
cam
lobes,
and the
points. Make the
necessary
repairs or
replacements.
Check
the
high
tension
wiring
for
signs
of
deterioration,
and make
replacements
or
repairs as
necessary.
(e)
Check the
coil
and
condenser. Replace
them if
they
are
defective.
(f)
Check
the
fuel
pump
pressure
and
adjust the
carburetor fuel
level.
Check
the
accelerator
pump
action
and
linkage.
(g)
If
the
problem still
persists,
perform
a compres
sion
test,
and
check the
valve
lash.
Check the valve
spring
rates
and
assembled
height.
Make repairs
or
replacements
as
necessary.
(7)
ENGINE
DOES
NOT
DEVELOP FULL
POWER.
Lack
of
power is
usually
caused
by
poor
compression.
However,
some
preliminary
checks
should
be
made.
Make
sure the
throttle
opens
all the
way,
and
the
choke
remains
open.
After
preliminary
checks
are
made,
perform
the
following
operations
if
the
trouble
has
not
been
located:
(a)
Check
the
compression.
This
will
indicate
whether
the
internal
components
are
operating
properly.
(b)
If the
compression
checks
within
limits,
check
the
ignition
system,
including
initial
timing
and
distri
butor
operation.
(c)
If
the
compression
and
the
ignition
system
are
satisfactory,
check the fuel
system,
including
carburetion
and
fuel
pump
pressure.
(d)
If
the
problem
still
exists,
a
check
of
mechanical
components
must
be
made.
Check the
valve
lash,
cam
lobe
lift,
and
valve
timing.
Make
the
necessary
repairs.
b. Fuel
System.
The fuel
system
consists
of
the
fuel
tank,
fuel
pump,
carburetor,
and
connecting
lines.
Dirt and
other
foreign
material are a
major source
of fuel
system
problems.
Keep
all components
as
clean
as
possible.
(1)
EXCESSIVE FUEL
CONSUMPTION.
Faulty
carburetion is
usually
responsible
for
excessive
fuel
consumption.
However,
the
following
preliminary
checks
should
be made:
Check for
fuel
leaks
in
the
system.
Check choke
oper
ation and
adjustment,
and
make
certain
the
accelerator
linkage
is
free.
Check
to see
if
the
brakes are
dragging.
Adjust
the
carburetor.
(a)
Verify
the complaint with test
equipment
in
stalled
in
the
car. Show the
customer how
improper
operation
of
the
car
will affect
fuel consumption.
(b)
If
the test shows
fuel
consumption
to
be
exces
sive,
rebuild the
carburetor.
Since
poor
carburetion is
usually
a combination
of
internal
malfunctions,
it is
usually
not advisable
to
try
to
repair
only
one system
in
the carburetor.
Time will
be
saved
by
a
complete
carburetor
overhaul.
(2)
CARURETOR FLOODS.
Make
a
visual inspec
tion of
the carburetor for
leaking
gaskets or
casting
defects.
Tap
the carburetor
bowl. If
the
flooding
stops,
the inlet needle was held
open
by
foreign
material.
If
the
flooding persists,
follow the
steps
below:
(a)
Remove
the
air
cleaner
and
check
the
choke
operation.
(b)
Check
the
fuel
level,
the
condition of
the
car
buretor
float,
and the fuel inlet
needle
and
seat.
Replace
any
defective parts.
(c)
Check
fuel
pump
pressure.
If
the
pressure is
excessive,
the
pump
was
forcing
fuel
past
the
inlet
needle and
the
pump
should
be
rebuilt or
replaced.
c.
Cooling
System.
The
cooling
system
is
thermostatically
controlled
to
regulate engine
operating
temperature
and
provide
for
a
short
engine
warm-up
period.
(1)
ENGINE
OVERHEATS.
Usually,
engine
over
heating
is the
result of
insufficient
coolant
supply.
Check
the
coolant level
first.
Make
certain
that
the
cause
of
trouble is
not
anti-freeze
evaporation.
(a)
If
the
supply
is
low,
check
for
leaks in
the
cooling
system,
then
make
the
necessary
repairs.
(b)
Check
the
water
pump
belt
for
proper
tension
and adjust
it if
it
is
loose.