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  1. #1
    Master Mechanic bigdaddy77084's Avatar
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    Jan 2010
    Location
    Houston, Texas, United States
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    649

    Unhappy 2000 3500hd blowing black smoke????

    I drive a 2000 3500hd at work & pulling a load it has no power and blows black smoke bad. changed air,fuel,oil filters.. The bosses mechanic is a jerk he is lost.. I think its the turbo or the air pump?????any help????
    95 tahoe 2dr 4x4 200,000+ miles

  2. #2
    Sr. Engineer Sam_A's Avatar
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    Jul 2010
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    Hattiesburg, Mississippi, United States
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    Default

    If it is a diesel, have you checked the injectors?


    2003 Chevy Silverado 2500HD LT 4x4, Crew Cab
    6.6L Duramax Diesel (LB7) with an automatic Allison 1000 5 speed.
    Spray-in bed liner, S&B Air Filter, Homemade CAI ram scoop, ball hitch for Gooseneck
    Black toolbox, metallic-black bowtie, 5.5" NV-200C Bumper Off-Road lights behind a blacked-out grille
    285/75R16E BFG A/Ts
    Future Upgrades: Exhaust, CAI, programmer, intercooler, torque converter

  3. #3

    Default

    x2 on injectors!

    2006 Duramax LBZ
    Edge Evo
    4'' Diamond eye to 6'' tip
    16'' ion alloy, 33'' fierce attitudes
    Lots of work left to do!

  4. #4
    Master Mechanic bigdaddy77084's Avatar
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    Jan 2010
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    Houston, Texas, United States
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    649

    Default

    His mechanic is lost. the service engine light is on. Its says its turbo pressure??? It goes down the road great with no load behind it.Starts right up,uses no oil. Yes it a diesel.
    95 tahoe 2dr 4x4 200,000+ miles

  5. #5
    Jr. Apprentice
    Join Date
    Oct 2010
    Location
    Frederick, CO
    Posts
    24

    Default

    I would have to agree on injectors, but first is the truck equipped with egr, because if the egr valve is hung paritally open due to soot accumulation then it would cause excessive black smoke and low boost pressure. And also check for any boost leaks in the pipes or intercooler.

  6. #6

    Default

    Check the vacuum pump out and check the waste-gate solenoid for operation and all the vac lines....
    Joseph


    Airforce Veteran (7 years)


    NRA Life Member

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