A well-running and adequately maintained diesel engine should produce no visible smoke from the tailpipe. Modern diesel engines equipped with common-rail direct-injection technology have unlocked more power and torque without emitting plumes of sooty, black smoke. Older diesels are relatively acceptable for spewing black smoke when gunning the accelerator pedal, but too much smoke could mean it’s time to visit the mechanic. For instance, excessive black smoke could mean issues with how the engine combusts the air and diesel
…
Read more