Why do diesels smoke when started?
You get an incomplete combustion during startup and it causes raw diesel fuel to come out of the stack.” Black smoke is caused by a very rich fuel-to-air ratio. Either the fuel pump has been turned up or there is a restriction in the air intake/exhaust.
Is it normal for old diesel engines to smoke?
Normally, diesel engines should not produce almost any smoke while working, however, it’s normal for some older diesels to release some smoke when accelerating under load.
What does white smoke from a diesel engine mean?
White Smoke: White smoke coming from the exhaust usually points to one point of failure: the injectors. Usually, white smoke indicates that the diesel fuel is not burning correctly. Unburned diesel fuel will make its way through the exhaust completely unused. Be careful of white smoke as it will irritate your eyes and skin.
What causes diesel smoke at Capital Reman exchange?
Diagnosing Causes of Diesel Smoke at Capital Reman Exchange Black smoke is the most common smoke color coming from a diesel engine and most likely indicates something is wrong during the combustion of the diesel fuel. When diagnosing the problem the first place to look at is the mixture of air and fuel flow into the cylinders.
What causes exhaust smoke in a truck engine?
The injection Actuation Pressure Control Valve could cause this if debris is clogging the valve. Using an electronic service tool check for logged or active diagnostic codes. Refer to 3100 HEUI Diesel Truck Engine Electronic Troubleshooting, SENR6566, for Injection Actuation Pressure Test.
When to shut down a diesel engine with smoke?
No matter the color of the smoke it is not something you should ignore. A properly working and maintained diesel engine should produce no visible smoke. Make sure to shut down the engine immediately if you encounter excessive smoke as further heat or load could severely damage the engine further.