Black Smoke Coming out Toyota HiAce Exhaust on Cold Start

Daron2000 on 16/08/2024 - 11:13
Last edited 16/08/2024 - 15:28 by 1 other user

Hey guys, have a question about my 2002 Toyota HiAce, it’s a 3.0L diesel automatic (also an import)

Runs like a dream but I’ve noticed every time I go to start the van on a cold start, a bit of black smoke comes out from the exhaust for about 2 or 3 seconds and then it stops.

Is this normal for a Diesel van or is my fuel to air ratio off? And do I need to get anything looked at? I haven’t noticed any leaks anywhere so not sure if it’s something to worry about.

If anyone can give me some tips on if this is bad or not, and what to get looked at would be much appreciated.

Cheers!

Automotive Toyota Van

Comments

  • jv on 16/08/2024 - 11:18
    +2

    Incomplete Combustion: When the engine is cold, the fuel may not burn completely, leading to black smoke.
    Dirty Air Filter: A clogged air filter can restrict airflow, causing a rich fuel mixture and black smoke.
    Fuel Injector Problems: Faulty or leaking fuel injectors can cause excess fuel to enter the combustion chamber.
    Glow Plug Issues: In diesel engines, faulty glow plugs can lead to incomplete combustion during cold starts.

    • DashCam AKA Rolts on 16/08/2024 - 11:22

      Is jv a mate of Uncle Ian?

      • jv on 16/08/2024 - 11:25

        🐿️

      • pegaxs on 16/08/2024 - 11:46
        +1

        More like a mate of Uncle Ian’s dense as lead brother, ChatGAV

    • Daron2000 on 16/08/2024 - 11:31

      Sweet as cheers mate!

    • HeWhoKnows on 17/08/2024 - 11:44

      jv
      Sometimes you surprise us all by coming up with some intelligent and useful replies.

      Would be good to link the source of your informationm should others wish to read further

      But let me add that diesel engines are designed for long distance running.
      If OP is doing short city trips their diesel engine wont be happy and such problems will occur.

  • Drakesy on 16/08/2024 - 11:18
    +4

    Sounds pretty standard for a 22 year old diesel without a DPF.
    As long as it's not constantly running rich you'll be fine.

    But as JV said the glow plugs may be getting a bit long in the tooth resulting in poor vaporisation of diesel on start.

    • Duckie2hh on 16/08/2024 - 11:20

      Whats a DPF?

      • jv on 16/08/2024 - 11:22
        +7

        ‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎Either:
        Digital Photo Frame
        ‏‏‎ ‎‏‏‎ ‎‏‏‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎or
        Diesel Particulate Filter

        • Murkymerv on 16/08/2024 - 12:08
          +4

          JV , “you’ve done it again”.

      • geekcohen on 16/08/2024 - 11:22
        +1

        Diesel Particulate Filter

      • DashCam AKA Rolts on 16/08/2024 - 11:23
        +9

        Dedicated Porn Filter

        • Drakesy on 16/08/2024 - 11:23
          +2

          Was the first thing I deleted.

      • Drakesy on 16/08/2024 - 11:23
        +2

        Diesel Particulate filter, Euro's started using them around 2009, Japanese and Koreans started using them around 2013 onwards.

        Also the bane of many a city dwelling diesel owner's lives. basically strangles the engine if it doesn't get cleaned out on a highway run regularly. Grenaded my Audi's injectors/head gasket etc because of it.

        • Daron2000 on 16/08/2024 - 11:33

          Are you saying a DPF blew your Audi's injectors or not having one did?

  • pharkurnell on 16/08/2024 - 11:29
    +4

    Its a diesel…
    its a diesel import..
    its a cold morning…

    I'd say totally normal

  • highon2str on 16/08/2024 - 11:32
    +1

    Once warmed up, accelerate hard and give it some. Black smoke should come out the rear. Repeat a couple of times and it should clear it out. It is common for older diesels driven gently to accumulate soot. Try this a couple of times and see if it improves the smoking on cold start.

  • pegaxs on 16/08/2024 - 11:44

    Normal. Diesels over fuel on start up, especially older diesels. It’s just how older diesel pumps operate. Newer diesels are the same, but the ecu takes care of most of it.

    Now, if it goes on for 2 or 3 mins, that is an issue. There should be no more than a slight puff of black smoke when cold on start up.

    Also, technically, diesels don’t run “rich” or “lean”, they “over fuel” and “under fuel”. Black smoke is over fueling with complete combustion, white smoke is over fueling with incomplete combustion.

    • Baysew on 16/08/2024 - 15:31
      +3

      Black smoke is over fueling with complete combustion, white smoke is over fueling with incomplete combustion.

      Also indicates if a new Pope has been elected or not.

  • Nugs on 16/08/2024 - 14:12
    +2

    My chinese tractor with 80 hours on the meter releases a puff of black smoke on start up, meh. My 1960s Massey Ferguson smokes under load, also meh
    .

  • WT on 17/08/2024 - 07:24

    cold start usually has a bit of extra fuel

    check how your glow plugs work, usually from ignition on and let it stay on for 4-5 seconds and then crank

  • Bob Svargis on 17/08/2024 - 09:23

    It's normal. Particularly for a diesel of that age. It could be burning the residual fuel that was sitting in the cylinder/crankcase. See any diesel of that age starting up and you'll notice it.

  • 2esc on 17/08/2024 - 11:20

    Do you do mostly short trips? How many kilometres has the car done? Serviced regularly? A fuel system additive worked for my Mitsubishi triton but it was only a tiny bit of smoke under hard acceleration.

  • Tigercjn on 17/08/2024 - 14:37

    Just use an additive like "Stop Smoke", most likely worn rings.

  • Tiller76 on 19/08/2024 - 13:40

    I literally just had my diesel fixed last week. I would get a lot of smoke for the first few minutes of starting the car when it was cold. Check your radiator fluid levels. If it is decreasing, you may have the same issue as me and that was a leak into the exhaust system.

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