Specifications

PART 1-1-GENERAL ENGINE SERVICE
1-5
ENGINE TROUBLE DIAGNOSIS GUIDE (Continued)
POOR ACCELERATION
ENGINE DOES NOT
DEVELOP FULL POWER,
OR HAS POOR HIGH
SPEED PERFORMANCE
EXCESSIVE FUEL
CONSUMPTION
IGNITION SYSTEM Leaky power valve, gaskets, or ac-
Incorrect ignition timing. celerating pump diaphragm.
Fouled or improperly adjusted
Dirt or corrosion in
accelerating
spark plugs.
s
y
stem
-
Improperly adjusted or defective Distributor vacuum passages in
breaker points.
the carburet
°r blocked.
Distributor not advancing prop- Restricted fuel filter.
erl
y EXHAUST SYSTEM
FUEL SYSTEM Exhaust gas control valve stuck
Inoperative accelerating pump in-
C 0Se
*
let ball check. BRAKES
Inoperative accelerating pump dis- i
mprope
r adjustment,
charge ball check.
Accelerating pump diaphragm de- TRANSMISSION
fectlve
- Clutch slippage (manual - shift
Float setting incorrect. transmissions).
Throttle linkage not properly ad- Improper band adjustment (auto-
justed, matic transmissions).
Accelerating pump stroke not Converter One-Way Clutch (auto-
properly adjusted. matic transmissions).
FUEL SYSTEM Improperly adjusted or defective
Restricted air cleaner. breaker points.
Restricted fuel filter. EXHAUST SYSTEM
Clogged or undersize main jets
and /or low float setting Exhaust gas control valve mop-
Clogged or undersize secondary
erative or stickin
^
jets (4-barrel carburetor). Restriction m exhaust system.
Power valve clogged or damaged. COOLING SYSTEM
Secondary throttle plates not
opening (4-barrel carburetor). Thermostat inoperative or incor-
Fuel pump pressure incorrect.
rect heat ran
S
e
-
Distributor vacuum passage in Check the cooling system for inter-
the carburetor blocked.
nal
leakage and/or for a condition
that prevents the engine from reach-
IGNITION SYSTEM ing normal operating temperature.
Ignition timing not properly ad-
justed ENGINE
Defective coil, condenser, or Perform an engine compression
rotor. test to determine which mechanical
Distributor not advancing prop- component of the engine is at fault,
erly. One or more camshaft lobes worn
Excessive play in the distributor beyond wear limit,
shaft.
Distributor cam worn. TRANSMISSION
Fouled or improperly adjusted Improper band adjustment (auto-
spark plugs. matic transmissions).
Determine the actual fuel con- preliminary check of the following
sumption with test equipment in- items before proceeding to the fuel
stalled in the car. and ignition systems.
If the test indicates that the fuel BOBMMIMADV rurrirc
consumption is not excessive, dem- PRELIMINARY CHtlKd
onstrate to the owner how improper CHASSIS ITEMS
driving habits will affect fuel con- Check:
sumption. Tires for proper pressure.
If the test indicates that the fuel Front wheel alignment,
consumption is excessive, make a Brake adjustment.
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