Possible Cause
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Possible Remedy
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Fuel injection pump or fuel injectors incorrectly set
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Refer to engine manufacturer's manual and replace or adjust faulty components
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Engine valve timing incorrect
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Refer to engine manufacturer's manual for correct settings and adjust
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Worn engine piston rings or liners
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Refer to engine manufacturer's manual and repair as required
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Burnt valves and/or pistons
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Refer to engine manufacturer's manual and repair as required
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Excessive dirt build up on compressor wheel and/or diffuser vanes
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Clean in accordance with details/instructions from Steve Boyle at UFI
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Turbocharger damaged
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Find and correct cause of failure, repair or replace turbocharger as necessary
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Dirty air cleaner
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Clean or replace element according to manufacturer's recommendations
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Restricted compressor intake duct
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Remove restriction or replace damaged parts as required
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Restricted air duct from compressor to intake manifold
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Remove restriction or replace damaged parts as required
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Restricted intake manifold
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Refer to engine manufacturer's manual and remove restriction
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Air leak in feed from compressor to intake manifold
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Replace seals, gaskets or tighten fastners as required
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Air leak beween intake manifold and engine
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Refer to engine manufacturer's manual and replace gaskets or tighten fastners
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Foreign object in exhaust manifold (from engine)
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Refer to engine manufacturer's manual and remove obstruction
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Restricted exhaust system
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Remove restriction or replace damaged parts as required
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Exhaust manifold cracked, gaskets blown or missing
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Refer to engine manufacturer's manual and replace gaskets or damaged parts
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Gas leak at turbine inlet/exhaust manifold joint
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Replace gasket or tighten fasteners as required
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