2007 Discovery 4 TDV6 - Emissions fail and black smoke?

Hi everyone,

2007 D3 TDV6 - 180k miles - FSH

It's my daily drive, plenty of motorway miles.

Have owned my lovely TDV6 for 18 months, already spent a bit on it, most recently both belts and oil pump, prop, clutch, flywheel and recon gearbox. It's just failed it's MOT on emissions with an advisory of black smoke under acceleration.

I took it the (great) guys who did the work above who plugged it in and got no fault codes, quick check around for evidence of split hoses or manifolds, nothing to report.

Chucked a bottle of some Diesel cleaner from Halfords (I know) in it and drove round for an hour and got it nice and hot before heading straight for it's retest...it failed again Looking for some good advice of what to try to solve it please.

myfirstl322 said:

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Really?? What could it be that would warrant that? I've seen people suggest boost pipe?

myfirstl322 said:

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Helpful!

LandyDan79 said:

Really?? What could it be that would warrant that? I've seen people suggest boost pipe?

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How does it run otherwise?

Runs fine, drove to Nottingham and back, 300 mile round trip, last week.

I was going to suggest turbo pipes at first but maybe not.
To modern for me anyway.

Black smoke may be fuelling related, have you heard of 'rolling coal' ?

LandyDan79 said:

Runs fine, drove to Nottingham and back, 300 mile round trip, last week.

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Mpg normal?

myfirstl322 said:

Black smoke may be fuelling related, have you heard of 'rolling coal' ?

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No?

myfirstl322 said:

Mpg normal?

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Yep! 33mpg on a run

LandyDan79 said:

No?

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Actually poor video choice.

Anaconda said:

Actually poor video choice.

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Haha, it's not quite those levels.

So, any actual suggestions that don't involve taking it to a field with a can of petrol and box of swan vesta's?

LandyDan79 said:

No?

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Basically it's deliberate over fuelling.

LandyDan79 said:

Yep! 33mpg on a run

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Ok, that seems ok tbh, so probably rules out a dicky injector,
at the miles you've got it could be turbo seals... and an intercooler in want of drain and flush, at least in the interim...


or a collapsing turbo intake pipe.

How does it perform?

myfirstl322 said:

Basically it's deliberate over fuelling.

Ok, that seems ok tbh, so probably rules out a dicky injector,
at the miles you've got it could be turbo seals... and an intercooler in want of drain and flush, at least in the interim...


or a collapsing turbo intake pipe.

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I'll try the intercooler flush and boost pipe.........then move onto the turbo Thanks

LandyDan79 said:

Haha, it's not quite those levels.

So, any actual suggestions that don't involve taking it to a field with a can of petrol and box of swan vesta's?

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I never suggested a field.

myfirstl322 said:

I never suggested a field.

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True, my bad, lol!