Smoke from diesels?

[NISaxoVTR]

Generally speaking you can't over fuel a diesel, the extra diesel that there isn't enough air to burn just gets blown out the exhaust without losing engine power so people just pump in way too much when they 'tune' them. On normal cars you get the odd puff on acceleration as there will be a small transition point when the turbo is spooling up that there is too much fuel for the air.

Edited by NISaxoVTR on Tuesday 6th November 22:14

[NR123]

Thanks for all the replies. Seems I should be looking for black(ish) smoke.

[Mike25886]

I have a mk6 vw golf 2.0tdi It smokes in 3rd gear during round town driving. But in no other gear ? And has dpf. Apart from this car runs fine. Should i worry or not ? Cheers

[rottenegg]

Mastodon2 said:

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.

Exactly. Nothing impressive at all about ANY vehicle belching out loads of smoke. The way everyone is virtue signalling about the environment these days, you might get lynched by tree huggers if your car is perceived (by them) to be a heavy polluter

And diesels shouldn't smoke at all by the way, unless they are: A) remapped (badly), B) really old technology, or C) not running correctly.