An engine that runs rough may indicate a misfiring cylinder. Assume that the auxiliary diesel engines on your OSV have a fuel injection system that permits the injectors to be disabled for troubleshooting purposes by loosening the high-pressure fuel injection line fitting at the injector nozzle while the engine is running and noting the engine response. Which of the following statements is true?

Question

Accepted Answer

After disabling the injector of a given cylinder, if the previously rough-running engine continues to run equally roughly with no change, this indicates that the cylinder associated with the disabled injector is misfiring.

Answer

After disabling the injector of a given cylinder, if the previously smooth-running engine runs rough with considerable change, this indicates that the cylinder associated with the disabled injector is misfiring.

Answer

After disabling the injector of a given cylinder, if the previously rough-running engine runs even rougher with considerable change, this indicates that the cylinder associated with the disabled injector is misfiring.

Answer

After disabling the injector of a given cylinder, if the previously rough-running engine now runs smoothly, this indicates that the cylinder associated with the disabled injector is misfiring.

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