Ohh dear, where has all the power gone?

[nismine01]

Symptoms, lack (total) of performance at low revs, even had to take a run up to get onto my drive way and that's not steep.

D3, 2.7 diesel with a Black Box computer tweak, 270,000 K.

It has felt like it was trying to start off in third gear it is that sluggish, off to the indee.

Now all the symptoms and effects.

Sluggish off the mark, will not hold speed on hills, turbo is not working correctly them power comes on and off we go, trailing huge clouds of black smoke. The smoke can be overcome by backing off or dropping a gear or two, getting the revs up.

My workshop can't look at it for several days yet, they are booked out that far in advance (it's been there a week already), they are suggesting either a stuck open EGR valve or the turbo variable side is stuck in the fast lane!

My problem with both these diagnoses is that when it is 'going' it is putting out so much black smoke and really feels as though the turbo is doing it's job..

Can anyone shed any light on this matter, had it happen to their V6 diesel and if so what was the outcome?

Can't say I'm looking forward to the bill either.

Cheers

Mike

[shanegtr]

Possible split turbo hose

[nismine01]

Surely that would show up when the turbo is really working.

That was the workshop's first 'hope' but they looked at the hose, said they were hard but not at fault.

Mike

[DeanoH]

Black smoke = oil, white/grey smoke = unburnt fuel. Perhaps turbo seal fail with lubricating oil being burnt ?

Deano

[justinc]

Split IC hose is always my first check with those symptoms... followed by EGR open

[nismine01]

Thanks Justin, but can you explain to me why no power down low when the pipe wouldn't have much pressure therefore split closed, no whistle or escaping air noise when it does pressure up. I just can't get my head around it.

cheers

Mike

[Disco-tastic]

Black smoke = oil, white/grey smoke = unburnt fuel. Perhaps turbo seal fail with lubricating oil being burnt ?

Deano???

I thought blue smoke was oil, black smoke was unburnt fuel and white smoke was a busted turbo or water in the oil.

[bsperka]

???

I thought blue smoke was oil, black smoke was unburnt fuel and white smoke was a busted turbo or water in the oil.Black smoke equals partially burnt diesel, white is fully unburnt diesel or water. If white and diesel, usually an injector issue.

[nismine01]

Well it was the EGR valve stuck open but the price of parts is staggering, $165 for a blanking plate and $65 for the gasket!!!!!!!!!!!!!!!!

Cheers and thanks to those who assisted.

Mike

[loanrangie]

Well it was the EGR valve stuck open but the price of parts is staggering, $165 for a blanking plate and $65 for the gasket!!!!!!!!!!!!!!!!

Cheers and thanks to those who assisted.

Mike

blanking kits can be found for about $35 on ebay ?

[oldsalt]

blanking kits can be found for about $35 on ebay ?

Yep... bought my blanking kit for about $38 from memory....

[Eric SDV6SE]

Yep... bought my blanking kit for about $38 from memory....

Do you have a part number for the SDV6SE 3.0Ltr? I can only find ones for D3 and 2.7L engines....

Thanks in advance

[oldsalt]

Sorry - mine's a D3 2.7 so that's what I bought....

cheers

[DiscoJeffster]

Do you have a part number for the SDV6SE 3.0Ltr? I can only find ones for D3 and 2.7L engines....

Thanks in advance

You can’t. It will fault code. You have to have it mapped out.

[Eric SDV6SE]

You can’t. It will fault code. You have to have it mapped out.
Thanks DJ, pretty sure it’s been mapped out with my tune, just not sure if they’re still open or closed, would be good to blank them off.

will keep investigating...

[jspyle]

Did your investigation reveal the problem?
has the issue been resolved?

[Tombie]

Thanks DJ, pretty sure it’s been mapped out with my tune, just not sure if they’re still open or closed, would be good to blank them off.

will keep investigating...

If they were mapped out whilst functioning they are closed (effectively blanked).

[Eric SDV6SE]

Thanks Tombie, yes they are mapped out and therefore closed.

[kenl]

Eric where did you get the mapping done? I thought it was still too hard for the SDV6 3.0l..

[Tombie]

Eric where did you get the mapping done? I thought it was still too hard for the SDV6 3.0l..

Bench tuning rather than OBD tuning.

[Eric SDV6SE]

Eric where did you get the mapping done? I thought it was still too hard for the SDV6 3.0l..

Roo Systems "towing and economy" ECU flash tune. Yes it's a bench top tune, but so far I'm happy with it. Been in for 18 months now.

Still want the 3" legendex 409 stainless exhaust too...