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Restricted exhaust system.
Action(s) to take:
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INSPECT the exhaust system. <<309-00>>
Excessive or insufficient compression.
Possible Source(s):
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Valve(s) burnt or sticking.
Action(s) to take:
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INSPECT the valve(s).
Possible Source(s):
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Valve spring(s) weak or broken.
Action(s) to take:
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INSPECT the valve spring(s).
Possible Source(s):
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Piston ring(s) worn, damaged, sticking or worn piston/cylinder.
Action(s) to take:
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INSTALL a new engine.
Possible Source(s):
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Head gasket damaged.
Action(s) to take:
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INSPECT the head gasket.
Possible Source(s):
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Carbon accumulation in combustion chamber.
Action(s) to take:
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