2007 Discovery 4 TDV6 - Emissions fail and black smoke?

LandyDan79 · Nov 13, 2023

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 · Nov 13, 2023

LandyDan79 · Nov 13, 2023

myfirstl322 said:
View attachment 302485

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

myfirstl322 · Nov 13, 2023

LandyDan79 · Nov 13, 2023

myfirstl322 said:
View attachment 302488

Helpful!

myfirstl322 · Nov 13, 2023

myfirstl322 · Nov 13, 2023

LandyDan79 said:
Really?? What could it be that would warrant that? I've seen people suggest boost pipe?

How does it run otherwise?

LandyDan79 · Nov 13, 2023

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

Anaconda · Nov 13, 2023

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

myfirstl322 · Nov 13, 2023

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

myfirstl322 · Nov 13, 2023

LandyDan79 said:
Runs fine, drove to Nottingham and back, 300 mile round trip, last week.

Mpg normal?

LandyDan79 · Nov 13, 2023

myfirstl322 said:
Black smoke may be fuelling related, have you heard of 'rolling coal' ?

No?

LandyDan79 · Nov 13, 2023

myfirstl322 said:
Mpg normal?

Yep! 33mpg on a run

Anaconda · Nov 13, 2023

LandyDan79 said:
No?

Actually poor video choice.

LandyDan79 · Nov 13, 2023

Anaconda said:
Actually poor video choice.

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?

myfirstl322 · Nov 13, 2023

LandyDan79 said:
No?

Basically it's deliberate over fuelling.

LandyDan79 said:
Yep! 33mpg on a run

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.

myfirstl322 · Nov 13, 2023

How does it perform?

LandyDan79 · Nov 13, 2023

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.

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

Thanks

myfirstl322 · Nov 13, 2023

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?

I never suggested a field.

LandyDan79 · Nov 13, 2023

myfirstl322 said:
I never suggested a field.

True, my bad, lol!

2007 Discovery 4 TDV6 - Emissions fail and black smoke?

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