What Causes a Diesel Vehicle to Fail to Shut Off When the Ignition is Turned Off?

1 Answers
LeEmmett
07/30/25 5:15am
In diesel vehicles, the fuel pump is not electrically powered; it operates as long as the engine is running. To shut off the engine, the high-pressure pump must be manually cut off from fuel supply by pulling a lever, which will cause the engine to stop after a few seconds. Below is relevant information: Introduction: Diesel engine idle speed typically refers to the operating condition where the diesel engine runs without load. For automotive diesel engines, this refers to the engine speed when in neutral. For diesel engines used in power generation, it usually refers to a certain no-load speed after startup, generally above 0.8 of its rated speed. As for diesel engines used as marine main engines, there is usually no such term as idle speed. How to Obtain: If you need to know the idle fuel consumption of a diesel engine, you can approximate it by checking its speed characteristic curve or load characteristic curve based on its idle speed value.
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