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ENGINE DOES NOT
DEVELOP FULL POWER
OR HAS POOR HIGH
SPEED PERFORMANCE
(Cont.)
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Fouled or improperly adjusted spark plugs.
Improperly adjusted or defective -breaker points.
Exhaust system
Restriction in system.
Cooling system
Thermostat inoperative or incor-rect heat range.
Thermostat installed incorrectly. Check the cooling system for internal leakage and/or for a condition
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tion that prevents the engine from -reaching normal operating temperature.
Engine
Perform an engine compression test to determine which mechanical -component of the engine is at fault.
One or more camshaft lobes worn beyond wear limit.
Worn valve guides.
Transmission
Improper band adjustment (automatic transmissions).
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EXCESSIVE FUEL CONSUMPTION
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Determine the actual fuel con- -
sumption with test equipment installed in the car.
If the test indicates that the fuel consumption is not excessive, dem-onstrate to the owner how improper -driving habits will affect fuel con-sumption.
If the test indicates that the fuel consumption is excessive, make a preliminary check of the following items before proceeding to the fuel and ignition systems.
PRELIMINARY CHECKS
Chassis items
Check:
Tyres for proper pressure.
Front wheel alignment.
Brake adjustment.
Exhaust system
System restricted.
Odometer
Check calibration.
Ignition system
Check:
Distributor breaker points.
Ignition timing.
Engine
Crankcase ventilation regulator valve defective or restricted tubes
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(Positive Crankcase Ventilation system).
FINAL CHECKS
Fuel system
Check:
Fuel pump pressure.
Engine idle speed.
Idle fuel mixture needle(s) for proper adjustment.
Automatic choke for proper operation.
Fast idle speed screw for proper -adjustment.
Accelerating pump stroke adjustment.
Anti-stall dashpot for proper adjustment.
Air cleaner for restrictions.
Float setting or fuel level.
Jets for wear and/or damage.
Power valve operation.
Air bleeds for obstructions.
Accelerating pump discharge nozzles for siphoning.
Accelerator linkage for binds.
Choke adjustment.
Ignition system
Check:
Ignition timing.
Spark plug condition and adjustment.
Distributor spark advance operation.
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**
