A.fuel must be preheated
B.intake air should be preheated
C.lube oil outlet temperature should be increased 20℃ above normal
D.none of the above
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A.carbon buildup in the exhaust manifold
B.overcooling of the exhaust manifold
C.eroded muffler baffle plates
D.high injection pressure
A.early fuel injection
B.excessive bearing play within the running gear
C.overloading of the cylinder
D.all of the above
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