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  #1  
Old 23-07-2009, 11:51 PM
omegav6 omegav6 is offline
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Angry Help please ML 270 cdi black smoking really bad

Hi all Iím wondering if someone can give me advice on what to try next, Iím getting frustrated with this now the car is smoking thick black smoke when you put your foot down hard and it doesnít stop when you let your foot off a bit. If you was three cars behind me you would think it had gone dark itís that bad, the performance donít seem that bad but i donít drive the car that much the Mrs drives it. Iíve tried giving it a good long hard run to clear it to no avail. The injectors have been re seated and new bolts and washers used, all filters are new and the maf has been cleaned. The car has covered 100k which i donít believe is a lot for this engine. Any help or advice on what to try next will be greatly received
I would also like to thank Kebo57 for all his help with the other problems ive had with the car

Last edited by omegav6; 23-07-2009 at 11:54 PM.
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  #2  
Old 24-07-2009, 06:41 AM
5pares 5pares is offline
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Could be a turbo problem if youve check all the simple stuff,hoses, injectors etc.
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Old 24-07-2009, 07:16 AM
omegav6 omegav6 is offline
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The turbo seems to be working fine and when the injectors where re seated they looked in vgc thanks for the reply
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Old 24-07-2009, 07:27 AM
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Usually Turbo blown ?--the smoke will be oil in the exhaust.
Needs a diagnostic plug in to confirm the problem.
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Old 24-07-2009, 07:28 AM
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I suspect a split boost pipe or intercooler.
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  #6  
Old 24-07-2009, 08:48 AM
omegav6 omegav6 is offline
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ive always thought that engine oil smoke was blue ish and derv smoke was black am i wrong in thinking this
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Old 24-07-2009, 09:14 AM
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Quote:
Originally Posted by BlackC55 View Post
I suspect a split boost pipe or intercooler.
+1, and they do take some clearing if pottered around.
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Old 24-07-2009, 09:25 AM
omegav6 omegav6 is offline
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it don't really potter around she does drive it hard but its all town work no m ways its had a good 150mile m way run now and problem still there ive just spoke to a fried of mine and hes give me a number for someone who has a machine to plug into the car and see if there is anything showing up but there have been no lights on on thes dash will this matter
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  #9  
Old 28-07-2009, 11:15 AM
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stumo stumo is offline
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I reckon I know what it is...

I forget the technical term for them, but this engine has these flaps in the inlet manifold, they are there to help with engine braking etc. They are driven electronically, and they have been known to fail.
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  #10  
Old 28-07-2009, 11:08 PM
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You said you had cleaned your MAF. That doesn't mean it is OK. It is the main article that gives you your air/fuel mixture. I'd be inclined to check it properly.
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