Black smoke when accelarating hard?

[131GAV]

It's a diesel. It's supposed to smoke. Unless it smokes so bad as to completely hide anything behind you, don't worry.

I know a car :fencelook:

 

[DieselFan]

It's a diesel. It's supposed to smoke. Unless it smokes so bad as to completely hide anything behind you, don't worry.

I disagree. If it's healthy and stock it should not smoke very much only a small puff on hard acceleration and I mean small puff. Tuned diesels are another story, they overfuel to increase torque and boost.

 

[stiaan]

It's a diesel. It's supposed to smoke. Unless it smokes so bad as to completely hide anything behind you, don't worry.

I disagree. If it's healthy and stock it should not smoke very much only a small puff on hard acceleration and I mean small puff. Tuned diesels are another story, they overfuel to increase torque and boost.

Its not really that bad, I can't see it in my rear view mirror when driving myself and accelerating hard, I only saw it when I was standing on the pavement and ask my wife to push it a bit when she was pulling of.
I'm just concerned because with my previous car, after the downpipe, I also asked her to do that, and there was no smoke, not even a puff.



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[ChefDJ]

It's a diesel. It's supposed to smoke. Unless it smokes so bad as to completely hide anything behind you, don't worry.

I disagree. If it's healthy and stock it should not smoke very much only a small puff on hard acceleration and I mean small puff. Tuned diesels are another story, they overfuel to increase torque and boost.

Its not really that bad, I can't see it in my rear view mirror when driving myself and accelerating hard, I only saw it when I was standing on the pavement and ask my wife to push it a bit when she was pulling of.
I'm just concerned because with my previous car, after the downpipe, I also asked her to do that, and there was no smoke, not even a puff.



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Then it really is nothing to worry about. Normal.

If you want to see a LOT of smoke, I'll take you to see a tuned 1.9 TDI.

 

[RAArmstrong]

It's a diesel. It's supposed to smoke. Unless it smokes so bad as to completely hide anything behind you, don't worry.

I disagree. If it's healthy and stock it should not smoke very much only a small puff on hard acceleration and I mean small puff. Tuned diesels are another story, they overfuel to increase torque and boost.

Its not really that bad, I can't see it in my rear view mirror when driving myself and accelerating hard, I only saw it when I was standing on the pavement and ask my wife to push it a bit when she was pulling of.
I'm just concerned because with my previous car, after the downpipe, I also asked her to do that, and there was no smoke, not even a puff.



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Then it really is nothing to worry about. Normal.

If you want to see a LOT of smoke, I'll take you to see a tuned 1.9 TDI.

I'd say its normal. Remember this is the older tech engine as well so a little more smoke than your previous 320d I'd say is to be expected.

 

[Silverbird_96kw]

Jip puffs are normal, a diesel with software will always puff more or smoke more due to fueling values being changed with boost etc

 

[ChefDJ]

Jip puffs are normal, a diesel with software will always puff more or smoke more due to fueling values being changed with boost etc

:withStu:

 

[netercol]

light smoke on hard acceleration is normal, much more air than fuel, keeps egt's down, big safty margin, factory settings..
remapped, more smoke on hard acceleration, depending on how aggressive the remap is.. less air to fuel, less safety margin , egt's have to be watched..
heavy black smoke on hard acceleration, too much fuel or too litttle air.. too aggressive fueling or something wrong induction side, boost leaks, turbo shot, ect..

so if your car smoked in a certain way, and suddenly starts smoking more without anything being changed, you better start looking for the problem, because black smoke means higher exhaust gas temps, and failure not far behind..

in your case, probbably a boost leak somewhere, stock diesel should really only smoke lightly, large safety margin on oem settings..

 

[RAArmstrong]

Surely different grades of diesel influence this to a degree? I notice when I run 500ppm, under hard acceleration there is a little more smoke than when I run 50ppm

 

[DieselFan]

You said it looked like the YouTube video of arbees the that is not light smoke. Something is wrong there.

This being the newer engine has nothing to do with it. If my e46 330d smoked ever so little with no cats. The e90 320d with dpf should not smoke at all. None of my 320ds smoked stocked

 

[car_fanatic]

Having read this thread about a smoking diesel, could it possibly be a crank case breather issue?

 

[DieselFan]

Having read this thread about a smoking diesel, could it possibly be a crank case breather issue?

unlikely, the guy in the thread has an e46 which uses the "loo roll" style filter which needs to be replaced. The e90 uses the "vortex" style which shouldn't get blocked.

 

[stiaan]

And miraculously the smoking is nearly gone, by itself, went to CT and back yesterday (350km), accelerating hard from time to time, and keeping it in 5th gear for long stretches, and ask my wife to accelerate hard when pulling away from work today, just a little black puff on pull away and from there, nothing.
Suppose it just needed that bit of a drive.
I still would like the EGR cleaned, check for vacuum pipe and boost leaks, have downpipe fitted, but in our area there's nobody that can do that, as my white 2008 N47 auto was much faster and more nippy than this one.

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[CliftonH]

Sometimes they need the open road and a good acceleration to clean it. As I stated above. Next time throw in a bottle of diesel boost before u do a stretch. It will help.

 

[AFR]

Hi man. A smoking diesel can be various of thing, but like eveyone said in the othr comments a small puff is normal. The small puff is there because there is not much air available in the low revs to burn all the fuel but the smoke should be gone in higher revs as the boost increases on a standard car. A remaped tdi doesnt always smoke it depends on the air fuel ratio which the tuner uses. The lower the air fuel ratio is the more power you will get but the more smoke you will have aswell. There are lots of tunef diesel cars running with minimal smoke.