Black smoke

Discussion in 'Diesel Tech / 24 volts' started by Webster77, Apr 9, 2017.

  1. Webster77

    Webster77

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    Noticed after my last fill up a puff of black smoke on startup or when I rev the motor. Could this be the diesel fuel or turbo lag. I've been watching the exhaust since purchase to see if there were any signs of issues. Idles fine, no issues with start up plenty of power through entire band. I did run a bottle of cleaner this last fill up also, could that be the result of the "cleanser" working?

    28 minutes ago
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  2. roscoFJ73

    roscoFJ73

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    Generally black smoke is unburnt fuel, either because your injection pump needs adjusting or your injectors need a rebuild.
    A blocked air intake can also cause black smoke.
    I don't know what diesel you have , but various types of diesels make more smoke than others.
    I doubt it has anything to do with a cleaner.
     
  3. Webster77

    Webster77

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    It only happens on start up or if you give he skinny pedal a quick tap, if you ease into the throttle no smoke and it doesn't matter what rpm you're pulling, just on the start up and if you tap the pedal... weird
     
  4. roscoFJ73

    roscoFJ73

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    That's pretty much normal for older diesels that have worn injector nozzles. Because they are worn, the first bit of fuel dribbles out instead of coming out as a fine spray. It will get slowly worse. Magic potions and cleaners wont help.
     
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  5. Webster77

    Webster77

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    By the way, the motor is a 1HD-T, in a 91 HDJ81, 184,000 km...
     
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