What are the causes of a multi-cylinder diesel engine runaway?

[LeMarley]

The causes of a multi-cylinder diesel engine runaway include excessive diesel fuel supply and engine oil entering the cylinder combustion chamber for combustion. When there is excessive diesel fuel supply: The resulting runaway is accompanied by thick black smoke from the exhaust pipe. You can inspect the components of the fuel supply system for analysis and repair. Check and service components such as the fuel pump, fuel injector, and governor. When engine oil combustion causes runaway: The vehicle's exhaust pipe emits blue smoke. You can inspect the components of the lubrication system. Determine whether the engine oil is overfilled or does not meet requirements, diesel leakage into the oil pan raising the oil level, or excessively high diesel temperature thinning the oil, making it easier to enter the combustion chamber for combustion—all of which can lead to runaway phenomena.