[James-335dx]

So since I've had my 335d I've never seen any soot or blackening around the exhaust and since the remap a few weeks ago much has stayed the same. However I've just been out for a lunchtime blast with a colleague, engaged full attack mode, Sport+ and stick to the left. On parking up at the office I noticed that the exhausts are now looking pretty mucky with soot which wasn't there prior to the 10 mile lunchtime drive.

Is this something to worry about? Or just maybe the exhaust having a good clear out after the blast?

[chris-c]

I'm not sure what other diesel owners consider bad but I get that after a little journey into the office. If I drive it for a tank on "attack mode" they'll look like someone has spilt a pot of black paint everywhere

[Watsey]

My exhausts are definitely sootier post-remap, and certainly sootier than yours.

[James-335dx]

Okay, thanks both. Might not be anything to worry about then by the sounds of it. Someone in the office mentioned that the DPF has a purge every so often so might just be that? Possibly encouraged by the thorough thrashing?

[goodbyalfa]

Dam that's a dirty diesel. I'd scrap it immediately and get a 440i...

[Tengocity]

Originally Posted by Watsey

My exhausts are definitely sootier post-remap, and certainly sootier than yours.

Same here. Still, better than the old E46 days and the shame of the down-turned pipes.

[JLR1969]

Pipes are always really clean even after a blast. If I wipe my finger inside then there is only a very slight amount of dust.

Never ever is it that bad.

I use Millers Eco Max additive which may help??

Black deposits are not ideal as it possibly shows the DPF is being overloaded and cant manage the amount of soot, I am not an expert though

Car has been mapped by Evolve

[James-335dx]

Originally Posted by Tengocity

Same here. Still, better than the old E46 days and the shame of the down-turned pipes.

Ha, Ha, True! I actually had an E46 330d

[James-335dx]

Originally Posted by JLR1969

Pipes are always really clean even after a blast. If I wipe my finger inside then there is only a very slight amount of dust.

Never ever is it that bad.

I use Millers Eco Max additive which may help??

Black deposits are not ideal as it possibly shows the DPF is being overloaded and cant manage the amount of soot, I am not an expert though

Car has been mapped by Evolve

Okay, thanks. I've never noticed any soot previously which is why i was a little worried/shocked to see it there after a short drive. Mine was mapped at Durham Remaps and haven't seen any soot etc since. I do run V-Power too so it's not as if its the horrid Tesco muck doing it.

Any experience of this apparent DPF regeneration?

[JLR1969]

Originally Posted by James-335dx

Okay, thanks. I've never noticed any soot previously which is why i was a little worried/shocked to see it there after a short drive. Mine was mapped at Durham Remaps and haven't seen any soot etc since. I do run V-Power too so it's not as if its the horrid Tesco muck doing it.

Any experience of this apparent DPF regeneration?

Some people say they can tell when it regens but I never have, its automatic so should sort itself out

What figures did the map take the car to?

I am sure its nothing to worry about, just give the pipes a good clean and monitor it

[James-335dx]

Originally Posted by JLR1969

Some people say they can tell when it regens but I never have, its automatic so should sort itself out

What figures did the map take the car to?

I am sure its nothing to worry about, just give the pipes a good clean and monitor it

Yeah hopefully not. I'll keep an eye on it and see if it does it again, hopefully it was just a bit of a clear out after the "attack mode" blast!

412BHP and 730Nm so it isn't slow now!

[DriveS]

When I had the tuning box on I had soot in the pipes. After my remap there is still some soot, but less, even without back box. The main thing is I dont get puffs of smoke coming out of the tailpipes on acceleration like I did with my E92 335d.

I dont think the amount I have or yours is anything to worry about.

[Manivxr]

Soot in pipes not a healthy sign me thinks. But mapping will increase the risk of soot. Keep an eye on the situation. Drive normally and see if the problem reoccurs. If it does then you may want your mappers to dial back on the map. The last thing you want is a knackered dpf.

Ps doesn't look overly sooty.

[Manivxr]

Originally Posted by James-335dx

Yeah hopefully not. I'll keep an eye on it and see if it does it again, hopefully it was just a bit of a clear out after the "attack mode" blast!

412BHP and 730Nm so it isn't slow now!

pushing over 400. That's pretty impressive. Nearly 30% increase. Pretty aggressive.

[James-335dx]

Originally Posted by DriveS

When I had the tuning box on I had soot in the pipes. After my remap there is still some soot, but less, even without back box. The main thing is I dont get puffs of smoke coming out of the tailpipes on acceleration like I did with my E92 335d.

I dont think the amount I have or yours is anything to worry about.

Thanks, I think I'm just a little concerned as I havent seen any soot previously to yesterday even though the map was done a couple of weeks ago. Certainly no clouds of black smoke though so that's good at least.

Originally Posted by Manivxr

Soot in pipes not a healthy sign me thinks. But mapping will increase the risk of soot. Keep an eye on the situation. Drive normally and see if the problem reoccurs. If it does then you may want your mappers to dial back on the map. The last thing you want is a knackered dpf.

Ps doesn't look overly sooty.

No, that's kind of what I thought too., especially as they were clean before yesterdays thrashing. Cleaned them off last night and drove normally this morning to the office and there is some light sooting on there again. Only very faint though this time. The back box delete probably doesn't help?

Originally Posted by Manivxr

pushing over 400. That's pretty impressive. Nearly 30% increase. Pretty aggressive.

I know, not bad for a stage 1, a few on here have questioned the figures suggesting the dyno is off but the stock figure seems realistic to me so not sure how it would be off after the map?

[Scottiedog]

I really wouldn't worry. My 435d has been remapped and I noticed after a dpf regen that there was a tiny amount of soot. When I had my 318d the exhaust was far more sooty than the 435d.

[KraigF30]

That’s not bad at all. The reality is they will let off a light dusting of soot under load. So little you’d never tell or notice it looking out your rear view mirror but you probably would if you let someone else drive it as you drove behind it in another car or observed it on the dyno.

Nothing to worry about, I’ve seen much worse.

The DPF will also automatically regenerate itself every 300-400 miles or so and burn off all soot in the dpf filter which will in turn likely soot up your tips too...

[NanasBack]

What does the back box do?
If that's been deleted, it may be because of that?

[NISFAN]

Your remap has most probably pushed fuelling above the 'smoke line' by some margin.
The dpf is not able to process the soot / burn off the excess fuel as well as a standard car, so you will have smoke and soot getting through.

Make sure you change engine oil more frequently. That excess diesel will be watering down your oil too.

[JLR1969]

Originally Posted by NISFAN

Your remap has most probably pushed fuelling above the 'smoke line' by some margin.
The dpf is not able to process the soot / burn off the excess fuel as well as a standard car, so you will have smoke and soot getting through.

Make sure you change engine oil more frequently. That excess diesel will be watering down your oil too.

How often would you change the oil?

[NISFAN]

Originally Posted by JLR1969

How often would you change the oil?

Depends on how often you use the loud pedal. But perhaps an intermediate oil change between CBS changes.

[James-335dx]

Originally Posted by NISFAN

Your remap has most probably pushed fuelling above the 'smoke line' by some margin.
The dpf is not able to process the soot / burn off the excess fuel as well as a standard car, so you will have smoke and soot getting through.

Make sure you change engine oil more frequently. That excess diesel will be watering down your oil too.

Thanks for the info, I think the additional oil change is a good idea. Might get that done soon as it's still 12k until next service. Mostly motorway miles at the moment so not blasting it too requently