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1-10
GROUP
1-
ENGINE AND EXHAUST SYSTEM
ENGINE TROUBLE
DIAGNOSIS GUIDE
(Continued)
Determine
the
actual
fuel
con
FINAL CHECKS
sumption
with
test
equipment
in
EXCESSIVE FUEL
stalled
in
the
car.
FUEL SYSTEM
CONSUMPTION
Check:
If
the test
indicates
that the
fuel
Fuel pump
pressure.
consumption
is
not
excessive,
dem
Engine idle
speed.
onstrate
to the
owner
how improper
Idle
fuel
mixture
needles
for
driving
habits
will
affect
fuel
con
proper
adjustment.
sumption.
Automatic
choke
for
proper
oper
If
the test
indicates
that the
fuel
ation.
Fast idle
speed
screw
for
proper
consumption
is
excessive,
make
a
adjustment.
preliminary
check
of
the
following
Accelerating
pump
stroke
ad
items before proceeding
to the
fuel
justment.
and
ignition
systems.
Anti-stall dashpot for
proper
ad
justment.
Air
cleaner
for
restrictions.
PRELIMINARY CHECKS
Float
setting.
Jets for
wear
and/or
damage.
CHASSIS ITEMS
Power
valve operation.
Check:
Air
bleeds for
obstructions.
Tires for
proper
pressure.
Accelerating
pump discharge
noz
zles
for
siphoning.
Front
wheel alignment.
Accelerator linkage for binds.
Brake
adjustment.
Choke
adjustment.
IGNITION SYSTEM
EXHAUST SYSTEM
Check:
System
restricted.
Spark plug
condition
and
adjust
ment.
ODOMETER
Distributor
spark
advance
opera
Check
calibration.
tion.
ENGINE
IGNITION
SYSTEM
Perform
an
engine
compression
Check:
test to
determine
which
mechanical
Distributor breaker
points.
component of
the
engine
is
at
fault.
Ignition
timing.
COOLING SYSTEM
ENGINE
Check
thermostat
operation
and
heat
range.
Crankcase
ventilation regulator
valve
defective
or
restricted
exhaust
TRANSMISSION
tube.
Check band
adjustment.
TEMPERATURE
SENDING
Low
oil
level
or
incorrect
viscos
UNIT
AND GAUGE
ity
oil used.
ENGINE
OVERHEATS
Unit
or
gauge
defective (not in
dicating
correct
temperature),
or con
COOLING SYSTEM
stant voltage regulator
defective.
Insufficient
coolant.
ENGINE
Cooling
system
leaks.
Cylinder head bolts
not
properly
Drive
belt
tension
incorrect.
torqued.
Radiator
fins
obstructed.
CONTINUED ON
NEXT PAGE
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