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Hi

My 850 TDI seems to produce the infamous diesel black smoke. It is not really noticeable on normal cruising but under acceleration it is at its worst.

Any ideas of how I can reduce this. Is there anything specific for this engine that would be worth checking?

Thanks

Stu
 

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Hi sk799, I would advise you to find a Bosh-Diesel garage near you and send the car over for a quick check, might be just a small regulation.
 

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A noticeable white smoke suddenly appeared on my exhaust one day, and set the Lambda light on. Refer to post on 'Lambda Light'. I sent it back to the dealer right away.

 

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I had the white smoke once when I left the car idling while parked for about a half hour.

I asked about it and it was nothing to be concerened about; it cleared up after driving.
 

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Please correct me if I'm wrong but I thought:

White smoke= water in fuel mix
Blue smoke = oil in fuel mix
black smoke= insufficient air in fuel air mix ie. incomplete combustion.

Barmy
 

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WATER (?) in fuel mix...?
That can't be good, can it?


I don't know, Barmy.
 

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Means badly gone head gasket, ie. you're leaking coolant into engine.
ie. its not smoke its steam!

...its not good.

QUOTE(ampangbear @ Apr 1 2005, 09:58 AM)WATER (?) in fuel mix...?
That can't be good, can it?

[snapback]6098[/snapback]​
 

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Correct.

But the Volvo 850 TDI does produce a nice black cloud as well when stepping on the gaspedal... nothing to really worry about! When disconnecting the EGR-valve, it slightly reduces, but don't expect miracles then!
 
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