Dirty Diesel VAG Pineapple roof rack black smoke

[sierraman]

I see a lot of diesels about recently with a big bore exhaust on with black smoke literally billowing out the back. What's the score with these? What have they done to it to cause it to smoke like that?

 

I'm assuming they've done this to fit in with some sort of scene. To me it just looks like there's some serious problems with the fuel injection equipment. I'm guessing the cherry bomb exhaust is in the name of performance, which is a contradiction in terms in a Polo diesel.

[twosmoke300]

Shit remaps/ pump tweaking

Egr faults

Maf faults

Boost leaks

Injectors fucked

[SiC]

Also...

Resistor mods on the MAP sensor or equivalent much more expensive "tuning box"

Often decatted too

 

At least rolling coal hasn't made it over here...

https://www.youtube.com/watch?v=iRu3xtTH9ng

[John F]

^ Cuntish behaviour.

[sierraman]

Why would you want to do that? Surely it also guarantees you attention from the plod plus an MOT fail? Can't see it doing the fuel economy much good either?

[billyboy406v6]

Its a scene thing dude, if you have to ask you aint in the scene dude, dude.

[lisbon_road]

Looks like I am not in the scene.

 

Thankfully.

[HMC]

Slightly on topic- what are the opinions on bypassing the EGR on diesels?

[SiC]

Depends on the age. Most will throw a EML, a lot will go into Limp mode. Also the EGR may be used to help cool the turbo.

 

Personally wouldn't recommend it. Usually pretty easy things to clean on most cars tbh. Just very messy - wear long kitchen gloves.

 

You can get it mapped out, but I don't know if I trust someone to hack around with the engine firmware like that (same with patching out DPF).

[Urko]

Slightly on topic- what are the opinions on bypassing the EGR on diesels?

My opinion is it's generally not a good plan - but I've (touch wood) had more trouble with pez EGR (yes they exist) on my ALDI than any of my dizzlers.  I reckon it depends on the engine and what kind of motoring you do.

[SiC]

Also give a spirited drive regularly helps keep it clean. Driving like Miss Daisy is one way of clogging them up quickly.

[Squire_Dawson]

I haven't come across this yet, thankfully (but can believe it). I hope to God it isn't the next Dubber scene 'thing'.

[Matt]

Slightly on topic- what are the opinions on bypassing the EGR on diesels?

 

I think it's somewhat standard practice amongst modified MK4 Golf and Bora owners.

 

Driving like Miss Daisy is one way of clogging them up quickly.

 

My workplace has diesel vans. And a speed limit of 10 mph. All but one of the vans stays on site all the time. Barely cracking 2k RPM. Imagine the horrors that lurk amidst the emission control systems.

[SiC]

I haven't come across this yet, thankfully (but can believe it). I hope to God it isn't the next Dubber scene 'thing'.

If it did, I'd make sure I'd always keep a can of this in the boot for their exhaust, if I re-saw it in a car park.

 

NO NONSENSE RAPID SET EXPANDING FOAM HAND-HELD 750ML

[SiC]

My workplace has diesel vans. And a speed limit of 10 mph. All but one of the vans stays on site all the time. Barely cracking 2k RPM. Imagine the horrors that lurk amidst the emission control systems.

Surely it'd make far more sense and cheaper to have a fleet of these? Especially as if those vans are modern, they'll have DPFs (and soon SCR filters) and other such stuff clogged up 100%.

https://www.nissan.co.uk/vehicles/new-vehicles/e-nv200.html

[Felly Magic]

It's a sad 'scene', and I think 'what a prat', and 'your car is fucked' when I see cars like that

[lisbon_road]

Bypass the EGR and the NOx will go up considerably I guess.  Can't be such a good idea.  Yeah, call me a tree hugger, I don't mind.  

[Matt]

Surely it'd make far more sense and cheaper to have a fleet of these?

 

It absolutely would. There were supposedly whisperings that head office were thinking about it but considering we've got a brand new Peugeot Boxer this year I don't think it's happening.

[Cavcraft]

My workplace has diesel vans. And a speed limit of 10 mph. All but one of the vans stays on site all the time. Barely cracking 2k RPM. Imagine the horrors that lurk amidst the emission control systems.

 

Same here, except 20mph limit or occasionally 30. Every van they've had for years has ended up bollocksed, except the ones we drive as we thrash the knackers off them once warm to clear them out.

[garbaldy]

My car used to smoke quite bad under acceleration untill I got it remapped more boost burns more of the fuel,

I also had the egr written out then blanked it and even at such low mileage it was pretty gunged up, its not just vag any one make forum has posts on how to do it as it's a common problem on pretty much all makes,

I have moted my nav three times now and the emissions have been lower the last two mots after blanking the egr, explain that.

 

Stick two hose pipes up your arse and let one vent and the other stick it in your mouth, then tell me you like breathing exhaust gasses,

[Urko]

Stick two hose pipes up your arse and let one vent and the other stick it in your mouth, then tell me you like breathing exhaust gasses,

Er...I'm not an engine?

 

Pretty much every diesel taxi I've been in over the last 5 years (which was 99% of em) has had the EML on - I assume for this reason.  EGR can work if it's done right I think, but some implementations of it aren't great.  With that said, EGR and DPF didn't give me trouble on  my Jaaag - presumably cos I used it for thrashing up and down motorways.  Nor did I have any bother with my Mondeo or (touch wood) This D3, although I know the previous owner had the EGR valves replaced.  The D3 and Mondy smoked/smoke if you really hammer 'em - Jaaag never did - assume due to DPF - but I've seen some very new stuff chucking out very black smoke too.

[SiC]

I have moted my nav three times now and the emissions have been lower the last two mots after blanking the egr, explain that.

EGR reduces NOx. NOx isn't tested in the MOT.

 

NOx reacts with ammonia, moisture, and other compounds to form nitric acid vapor and related particles. Small particles can penetrate deeply into sensitive lung tissue and damage it, causing premature death in extreme cases. Inhalation of such particles may cause or worsen respiratory diseases, such as emphysema or bronchitis, or may also aggravate existing heart disease.[15]

 

NOx reacts with volatile organic compounds in the presence of sunlight to form ozone. Ozone can cause adverse effects such as damage to lung tissue and reduction in lung function mostly in susceptible populations (children, elderly, asthmatics). Ozone can be transported by wind currents and cause health impacts far from the original sources. The American Lung Association estimates that nearly 50 percent of United States inhabitants live in counties that are not in ozone compliance.[16]

 

NOx also readily reacts with common organic chemicals, and even ozone, to form a wide variety of toxic products: nitroarenes, nitrosamines and also the nitrate radical some of which may cause biological mutations. Recently another pathway, via NOx, to ozone has been found that predominantly occurs in coastal areas via formation of nitryl chloride when NOx comes into contact with salt mist.[17]

Not something that we really should be breathing in at any concentration.

[lisbon_road]

Took this picture at a scrapyard recently.

[Guest Lord Sward]

I would get rid of the EGR valve every time.  Its not normal and kills any engine.  You're pumping unfiltered exhaust emissions into the intake system.  Everything chokes up eventually, killing the engine.  I've got 2 diesels.  One has been blanked for over 100k now.  They intake system is spotlessly clean and the engine reliable. The other is still under warranty and is therefore open.  So far the wretched contraption has clogged with coolant once and will now be clogging with soot.  I'm running on premium diesel, adding 2x bottles of additive every 6 months and changing the expensive low ash oil at less than half of the recommended intervals.   How is that good for an engine or the environment as a whole?

[Matt]

Same here, except 20mph limit or occasionally 30. Every van they've had for years has ended up bollocksed, except the ones we drive as we thrash the knackers off them once warm to clear them out.

 

Aye I wouldn't touch any of them even if they were very cheap. Good thing they're long term rentals! We're supposed to return them in the same condition (read: new) that we got them in. Yeah, about that...

[bub2006]

The xantia I have now has no rear silencer or cat. It also smokes a bit when you toe it. It was like it when I got it,it went through mot too. I am not in a scene or at least don't think I am. Think its when fuelling and boost is turned up. Some folk go too far though. Where I live its discovery's with black smoke belching out thick and fast with monumental noise

[twosmoke300]

That picture was an Opel 2.0/2.2 dti . They all do it but surprisingly doesn't make much difference to performance . Prob cos it's turbo so the air is just forced through

[Guest Lord Sward]

Toyota D4-Ds are the worst for choking the full intake system.

[Squire_Dawson]

I've said it once, I'll say it again; the best thing to do is to get rid of diesel engines in private cars, vans and buses full stop (HGV's excepted). Nasty, stinking things, which do not even make sense anymore on our over-crowded roads. At least the tide seems to be turning against diesel, which is about time, though I disagree with calls for a mass scrappage scheme.

[sierraman]

I'm not a particular fan of diesels but I think the whole anti diesel thing has got out of hand. There's still a staggering amount of 10-15 year old diesels knocking about so the problems of DMF, injectors etc can't be as widespread as what people make out. I'm not saying for a minute a common rail diesel is a paragon of reliability, but there seems to be s lot still chugging away at 10-15 years old. I'll take the Mk3 Mondeo as example, there's loads of diesel ones knocking about, if they were that unreliable there would be hardly any left. Apart from the 2.5 V6 there's potential problems with all the engines, the petrols are prone to the rings going west and the diesels prone to injector faults, neither cheap to fix, you pays your money you take a chance.