Member Since: 24 Jun 2009
Location: COVENTRY
Posts: 48
Poor Fuel Economy and black smoke on acceleration
Hi all
I'm still trying to sort my 54plate tdv6 disco. I've just changed the front suspension arms and track rods, at least it goes round corners better now!
I am getting roughly 21mpg when my wife (miss daisy) drives and 18mpg when I do, it doesn't seem to improve on long runs, even when resetting the trip.
I get a large ammount of black smoke when pulling away anything other than gently.
I've blanked the egr valves.
Is this right? It doesn't "feel" quite right either, any pointers??
JOhn
11th Dec 2009 1:27 pm
Spooky
Member Since: 02 Jun 2009
Location: Swindon, Wilts
Posts: 1013
That ain't right, and it's a good 6 mpg down too.
I'd suggest checking the air filter, intercooler (for blockages), air hoses (for delamination) and turbo (nozzles seized). You'll need a diagnostic system to check for the last.
Whatever the cause is, the poor car's being starved of air and is massively over-fuelling in an attempt to compensate ...Regards,
Mick
- 2014 SDV8 Autobiography
- 'Vincent' - 2010 TdV8 Vogue SE - 'Molly' - 2005 HSE Auto
'Dixie' - 2000 D2 Td5 ES
11th Dec 2009 1:58 pm
John C
Member Since: 28 Aug 2007
Location: East Yorkshire
Posts: 3292
I'd second the air filter. LR recommend changing every 45K - which is daft. Chances are yours may have done almost 45K on the current one 2020 SDV6 D5 HSE, Carpathian Grey +
2022 Tesla Model Y LR... almost Carpathian Grey
Previously : 2005 TDV6 SE Auto, Cairns Blue (288K) - ours for 16 years
11th Dec 2009 1:59 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72798
Change my air filter every 15k, changing them at 45k is b ks!!!
11th Dec 2009 2:07 pm
bellautos
Member Since: 02 Feb 2006
Location: NorthYorkshire
Posts: 2532
Ill second the possibilitys of an intercooler hose delamination, splits or split cooler, and at worse which i doubt the turbo.
Pete
11th Dec 2009 6:13 pm
c928jon
Member Since: 24 Jun 2009
Location: COVENTRY
Posts: 48
Agreed not right at all....
Air filter was changed a couple of weeks ago, i've checked the main intercooler hose where visible but no sign of a split.
Do MAF's fail on the disco?
11th Dec 2009 6:18 pm
countrywide
Member Since: 16 Sep 2007
Location: UK
Posts: 6019
You need to check inside the pipe as when it delaminates it blocks internally.
11th Dec 2009 6:20 pm
al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10299
guys, my 09 model, with just 10k on the clock is below average for economy in my mind. Ok on a steady run, but around town (when having to use the right pedal) is high teens at best. When I do floor it, there's so much gunk out the back I loose sight of the cars behind, but I wouldnt say its black smoke, more greyish.
Been back to the stealers who say no issues found/faults logged.
Would a turbo hose be delaminating this early in its life?
Al
PS, filter is good, ITG profilter fitted.Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD
11th Dec 2009 6:26 pm
Spooky
Member Since: 02 Jun 2009
Location: Swindon, Wilts
Posts: 1013
Tis a possibility, Al. The only sure way is to pull them off for a look-see ...Regards,
Mick
- 2014 SDV8 Autobiography
- 'Vincent' - 2010 TdV8 Vogue SE - 'Molly' - 2005 HSE Auto
'Dixie' - 2000 D2 Td5 ES
12th Dec 2009 1:19 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20733
Re: Poor Fuel Economy and black smoke on acceleration
I take it you had a 4 wheel alignment done after changing the arms etc?
If the alignment is out, of are effectively scrubbing the tyres as you drive along, causing more drag, hence higher fuel consumption...
Also, did you remove the pipe that goes from the EGR valve to the inlet butterfly? I forgot to clip that in once (at the butterfly end), caused lack of power and loads of smoke Just a thoughtMy D3 Build Thread
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10299
and if you've blanked the EGR's, have you taken the butterfly out, or at least fixed it open, as you wont be getting any air through to mix with the deisel when the EGR's are open (as you've blanked them off) and the butterfly closed.
AlVolvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD
12th Dec 2009 11:55 am
c928jon
Member Since: 24 Jun 2009
Location: COVENTRY
Posts: 48
Alignment was done, by stealer.
Butterfly is out and just rechecked the egr connectors..all ok
I've taken the top connection off the main hose and put endoscope down, looks ok.
Was hoping for an intercooler full of clay, but that looks very clean too.
The only thing i've noticed is some oil staining down in the passanger side of the intercooler, I assume that if oil can get out, so can air. Just going to dig a bit further now.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
- 2014 SDV8 Autobiography
ks!!!
Just a thought
