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Engine hard to start or will not start
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No fuel
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Fill tank with proper fuel.
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Air in the fuel system
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Bleed air from fuel system.
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Low ambient air temperature
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Use cold weather starting aids.
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Clogged fuel filter
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Replace filter element.
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Crankcase oil too heavy
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Use oil of proper viscosity.
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Engine knocks
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Insufficient oil in engine
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Add more oil.
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Fuel injection pump incorrectly timed
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See your dealer.
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Engine overheats
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Low coolant level
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Fill radiator to proper level. Check cooling system for leaks.
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Loose or defective fan belt
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Adjust or replace fan belt.
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Cooling system needs flushing
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Drain, flush and refill cooling system.
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Dirty oil cooler or grille screens
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Clean oil cooler and screens.
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Defective thermostat
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Remove and check thermostat.
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Engine oil pressure too low
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Low engine oil level
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Add more engine oil.
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High oil consumption
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Oil of too low viscosity
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Drain and refill with oil of correct viscosity.
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Oil leaks
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Check for leaks in lines and around gaskets.
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High fuel consumption
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Wrong type of fuel
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Use a suitable fuel grade.
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Incorrect valve clearance
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See your dealer.
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Fuel injection nozzles dirty or damaged
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See your dealer.
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Engine incorrectly timed
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See your dealer.
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Clogged or dirty air cleaner
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Service air cleaner.
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