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NR123

Original Poster:

784 posts

73 months

[news] 
Tuesday 6th November 2012 quote quote all
Is some smoke from a diesel normal? I asked a seller if there was any smoke from the exhaust and he said just the usual puff when you put your foot down around town. Is that normal?

littlebasher

1,298 posts

55 months

[news] 
Tuesday 6th November 2012 quote quote all
Yep

No poke without smoke

TheEnd

14,088 posts

72 months

[news] 
Tuesday 6th November 2012 quote quote all
Can be, depends on the car and what someone classes as smoke.
Fords seem to chuff out a good bit when they floor it.
Newer cars with DPFs shouldn't make any smoke.

Pints

15,949 posts

78 months

[news] 
Tuesday 6th November 2012 quote quote all
TheEnd said:
Can be, depends on the car and what someone classes as smoke.
Fords seem to chuff out a good bit when they floor it.
Newer cars with DPFs shouldn't make any smoke.
And when you give it a bootful to clear the ol' DPF?

I might be talking cobblers.

NR123

Original Poster:

784 posts

73 months

[news] 
Tuesday 6th November 2012 quote quote all
The car is a MK5 Golf 2.0 GT TDI (2005). I thought some smoke was normal. What colour should it be?
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340600

380 posts

27 months

[news] 
Tuesday 6th November 2012 quote quote all
NR123 said:
The car is a MK5 Golf 2.0 GT TDI (2005). I thought some smoke was normal. What colour should it be?
Black. White smoke = not good.

GoodDoc

372 posts

60 months

[news] 
Tuesday 6th November 2012 quote quote all
Black smoke from the VAG 2.0TDi in my car is okay, clouds of smoke from the VAG 2.0TDi in my mate's car is very bad.

Work out if it has a DPF, if it doesn't then you can get impressive black smoke when you boot it, more so if you've been driving like an old fart for a few days, but a DPF equipped car shouldn't.

TheEnd

14,088 posts

72 months

[news] 
Tuesday 6th November 2012 quote quote all
Diesel smoke is black, and usually it'll be a light haze that just looks dark, not actually a black cloud.
White may turn up on starting (unburnt diesel) and light-greyish blue is oil and is a bad sign.

Condi

3,698 posts

55 months

[news] 
Tuesday 6th November 2012 quote quote all
Early 00's or late 90's diesels give out quite impressive amount of smoke at times! biggrin

As far as an MOT goes there is allowed to be a small amount of smoke on startup which clears quickly is I think the official wording. The emissions tests are done at a constant rpm so as long as the thing isnt overfuelling then you should be fine.

cra1gy1989

293 posts

28 months

[news] 
Tuesday 6th November 2012 quote quote all
I have a 1.9 tdi Fabia vrs remmaped, and it chucks out loads of sutty black/grey smoke! If its black its fine, if its blue or white its not!

Superhoop

3,181 posts

77 months

[news] 
Tuesday 6th November 2012 quote quote all
Condi said:
The emissions tests are done at a constant rpm
Happy to be corrected, but isn't the diesel smoke test done by accelerating the engine up to the max governed engine speed?

Petrol engines are constant speed

Mafioso

2,193 posts

98 months

[news] 
Tuesday 6th November 2012 quote quote all
cra1gy1989 said:
I have a 1.9 tdi Fabia vrs remmaped, and it chucks out loads of sutty black/grey smoke! If its black its fine, if its blue or white its not!
Ditto. It's quite embarrassing actually. I feel a stupid rep in his Mondeo...

sunbeam alpine

2,623 posts

72 months

[news] 
Tuesday 6th November 2012 quote quote all
We've got a Golf TDI (had it from new) and it kicks out loads of black smoke if you boot it hard. It's almost a smokescreen! Car's got 220000 approx and still going strong.

XDA

1,980 posts

69 months

[news] 
Tuesday 6th November 2012 quote quote all
Mafioso said:
cra1gy1989 said:
I have a 1.9 tdi Fabia vrs remmaped, and it chucks out loads of sutty black/grey smoke! If its black its fine, if its blue or white its not!
Ditto. It's quite embarrassing actually. I feel a stupid rep in his Mondeo...
DPF hides my black cloud.

/smug tongue out

Stu R

20,741 posts

99 months

[news] 
Tuesday 6th November 2012 quote quote all
Rolling coal hehe


andy-xr

9,630 posts

88 months

[news] 
Tuesday 6th November 2012 quote quote all
My little Rover doesnt put out any diesel smoke at all. It gets run 100 miles a day so it might be that it doesnt get chance to build up, but I thought it was a process that just happened as a byproduct of it being a diesel.

My old CMAX had a lot less miles, was in better nick, a lot better serviced and had 8 more valves, but used to smoke like Dot Cotton when it was being pushed.

Jordan Rich

80 posts

26 months

BFG TERRANO

1,660 posts

32 months

[news] 
Tuesday 6th November 2012 quote quote all
may be utter cr@p but I was told its not smoke but soot particles being blown from the exhaust and turbo? Usually when you give it some after long spells of gentle driving?

BFG TERRANO

1,660 posts

32 months

Mastodon2

8,920 posts

49 months

[news] 
Tuesday 6th November 2012 quote quote all
GoodDoc said:
Work out if it has a DPF, if it doesn't then you can get impressive black smoke when you boot it, more so if you've been driving like an old fart for a few days, but a DPF equipped car shouldn't.
Impressive? Do you not mean "embarrassing"?

Diesels blowing smoke like soot stacks is not unusual, this is why diesel exhausts point down towards the ground where they would normally sit parallel to the road on petrol versions, as shooting the soot downwards disguises it against the dark surface of the road.
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