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Thread: 02 TD5 Def'r blowing black smoke under load

  1. 10th February 2017, 08:08 PM #1
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    LouNat58
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    02 TD5 Def'r blowing black smoke under load

    Hi All,
    Apologies if this has already been covered, but I could not find anything.
    I am very new to diesels so here goes.
    My truck intermittently blows black smoke when I accelerate- embarrassingly so.
    Obviously it is over-fueling but I am not sure where to start looking.
    The vehicle has recently had the ECU re-mapped if that matters.

    Any help appreciated on what i should be looking at to find the problem.

    Lou
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  2. 11th February 2017, 05:37 AM #2
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    Reads90
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    Black smoke is normally too much fuel or not enough air

    Cleaning the intercooler would help as they get dirt clogged and don't let enough air through. Also check you turbo Hoses are not collapsing
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  3. 11th February 2017, 05:57 AM #3
    Graeme
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    A common cause is the hose to the I/C collapsing due to delaminating internally.
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  4. 11th February 2017, 07:02 AM #4
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    I would get the vehicle onto a diagnodtic tool and check some realtime figures out too. Some remaps are quite aggressive and WILL blow a fair bit on full noise however that is not desireable for lots of reasons...
    As mentioned above check boost pressure, at the point it is smoking at , you should be at the 230Kpa(absolute) mark if not then look closely at a turbocharger or wastegate issue . Anything over 240Kpa generally sends these into fuel cutout. You WILL know when that happens 😅. Was the MAP a commercially common one from a particular supplier? No need to mention it here, a PM would be fine... some are quite over the top.

    Jc
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  5. 11th February 2017, 07:50 PM #5
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    Hi Justinc,
    You certainly know your stuff. I hadn't mentioned the fuel cutout issue, but it has done that to me on two days. One day last year it cutout 2-3 on the way to work and from work, then a few weeks ago the same thing both morn.ng and afternoon. Not nice in the middle of an intersection. I agree I will have to borrow a nanocom see what the boost is doing etc.
    The re-map was done commercially apparently on a chassis dyno.
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