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DANO2014's avatar
DANO2014
Explorer
Jun 16, 2014

EXHAUST HEAVY BLACK SMOKE

I have a ALLEGRO BUS, 2002....GOING DOWN THE HIGHWAY THIS WEEKEND AND NOTICED MORE THAN NORMAL BLACK SMOKE COMING OUT OF MY EXHAUSE (CATAPILLA ENG 330 HP)....IT COVERED MY TOW VEHICLE....STILL HAD POWER, NO LIGHTS CAME ON TO REGISTER ANY MALFUNCTIONS. MAINTENANCE HAS BEEN KEPT UP ON OIL, FILTERS ETC.
HAS ANYONE HAD THIS ISSUE OR FAMILIAR WITH THIS PLEASE ADVISE ME ON A POSSIBLE SOLUTION/CORRECTION AND/OR PROBLEM..YOU MAY HAVE EXPERIENCED.
IT JUST STARTED THIS WEEKEND AND IS @ A RV REPAIR FACILITY APPROX 100 MILES FROM MY HOME.

THANKS & APPRECIATE ALL INFO;

DANO2014
337 296-9568
Class A

15 Replies

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  • RFCN2's avatar
    RFCN2
    Explorer
    Jun 17, 2014
    When mine did that three summers ago the turbo was blown.
  • wolfe10's avatar
    wolfe10
    Explorer
    Jun 16, 2014
    In order:

    What is your air filter minder reading-- it indicates blockage of air to the engine intake? OR, how old is your air filter?

    Check that exhaust brake is fully open. Lubricating it on schedule helps keep it working properly. If PacBrake: http://pacbrake.com/supplemental-brakes/prxb-exhaust-brakes/maintenance/

    When was the last time you cleaned the front of your CAC (Charge Air Cooler)? If dirty, intake air temperatures can sky rocket. Affects any diesel engine.

    If none of the above, take it to a Caterpillar dealer before you do damage.
  • JetAonly's avatar
    JetAonly
    Explorer
    Jun 16, 2014
    Too much fuel for the available air. Do you have an exhaust brake? Could be air cleaner, bad turbo, CAC/plumbing leaking, stuck exhaust brake. That vintage motor has had some issues with its high pressure fuel pump, too.

    Let us know what you find out.
  • Dog_Folks's avatar
    Dog_Folks
    Explorer
    Jun 16, 2014
    Please shut off your caps lock. The post would be a lot easier to read.

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