Normal being relative? It’s a diesel engine that will “roll coal” if it’s fed too much fuel. Occasionally that can be normal and used tactically to create a smoke screen. However this particular one I’m chalking to beat up engine issues - clogged air filters or failing fuel injectors.
Normal being relative? It’s a diesel engine that will “roll coal” if it’s fed too much fuel. Occasionally that can be normal and used tactically to create a smoke screen. However this particular one I’m chalking to beat up engine issues - clogged air filters or failing fuel injectors.
It could also just be a cold engine.