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Home > Technical > grey unburnt diesel smoke and smell on cold start up & l |
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johnboyt04 Member Since: 28 Feb 2018 Location: westsussex Posts: 36 |
not looking good 40 people looked and no ideas |
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5th Feb 2019 3:28 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5062 |
A short video of the smoke on start up you are writing about might be helpful to your readers.
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5th Feb 2019 4:54 pm |
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Space Member Since: 26 Jan 2019 Location: FOLKESTONE Posts: 148 |
Its a diesel its what they do |
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5th Feb 2019 5:33 pm |
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johnboyt04 Member Since: 28 Feb 2018 Location: westsussex Posts: 36 |
no i got 4 diesel cars and they all start and run fine |
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5th Feb 2019 5:54 pm |
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johnboyt04 Member Since: 28 Feb 2018 Location: westsussex Posts: 36 |
no dpf and sorry when i say cold i mean the engine is cold not the weather can be 10 degrease in the morning and still will do it have an other guy with same problem message me on a facebook forum |
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5th Feb 2019 5:55 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 5062 |
Without knowing the extent of your smokiness its hard to comment - all my diesels in the pre-DPF days smoked a bit on cold start up.
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5th Feb 2019 6:29 pm |
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dondiddy Member Since: 16 Apr 2017 Location: Hamilton Posts: 753 |
Have you checked for water in the fuel, is the engine using any coolant? As you have checked/replaced all of the usual culprits it might be time to take it to a diesel specialist who can perhaps diagnose a faulty fuel pump or other such issues like cracked head/faulty head gasket that don`t throw up any fault codes. Looking online this sort of issue seems to affect diesels of all makes and again is caused by the likes of faulty glow plugs/faulty/leaking injectors etc but you have ruled most of the normal culprits out. Sorry I cannot be more help without having the car in front of me. |
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5th Feb 2019 6:34 pm |
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JGH99 Member Since: 06 Nov 2015 Location: Derbyshire Posts: 193 |
Hi, not sure if it's relevant but mine used to do this, especially when cold, before I blanked the EGR. Never done it since.
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5th Feb 2019 6:38 pm |
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Yorky Bob Member Since: 28 Apr 2015 Location: Yorkshire Posts: 4561 |
How was the compression test ? FL2 MY10 TD4 GS traded in at 2 years
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5th Feb 2019 8:34 pm |
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johnboyt04 Member Since: 28 Feb 2018 Location: westsussex Posts: 36 |
Compression test all good no water used or leaking and egr blanked of to plus black smoke is not unburnt it’s burnt
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5th Feb 2019 8:53 pm |
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Yorky Bob Member Since: 28 Apr 2015 Location: Yorkshire Posts: 4561 |
If you had blue smoke I would be checking for worn valve guides and seals. As you say it’s black it’s over fueling but only on start up if no issues when warm. Maybe time to make a video a few cold starts and show us just how bad it is. FL2 MY10 TD4 GS traded in at 2 years
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5th Feb 2019 9:19 pm |
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turbodi16v Member Since: 25 Nov 2013 Location: devon Posts: 30 |
You fitted new injectors but were they coded in?. Also have you checked the common rail sensors, and checked the rail is at the right pressure prior to starting,. |
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5th Feb 2019 10:41 pm |
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Past master Member Since: 30 Jun 2010 Location: Isle of Ely Posts: 2710 |
Worn valve seals/guides is certainly a possibility. Otherwise, I'd say that the glow plugs are not working properly. You say they have been checked, so it could be something in the control system not switching them on properly.
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5th Feb 2019 10:44 pm |
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