Black smoke from tdi

[fk1nrapid]

What do you mean by reducing EGR?

Just had a look at EGR and it looks like its a fairly new one. Do they need replacing alot? its maybe just very clean for its age. Car is on 55 plate

 

[FAST AL]

K n N filter it seems to a semi expert cupra tdi driver needs to be left well alone.Changing paper filter on regular service is best.Only gain up to 10ish bhp max on them gaining on throughflow of air but loosing out on purity of air being filtered.In short basically NOT WORTH THE FIFTY QUID.ESPECIALLY ON A HIGH BHP OUTPUT ENGINE WHERE THE K N FILTER PERFORMANCE IS BARELY NOTICEABLE IF AT ALL.

 

[ini]

Use vag-com etc, to reduce EGR function to the minimum, this will give you a denser charge on part throttle, and help reduce smoke if you have any.

 

[sssstew]

yeah agreed with ini above re the air filters.

not sure about the map sensor override, its better not to fool the engine and have it properly remaped for a safe improvement.

 

[gooner84]

Following this thread as ive got the same problem, just wondering if anyone can post pictures of the location of the intercooler pipes that pop off please as i have no clue where to look.
cheers.

 

[Yella Beeza]

There are only a very few aftermarket filters that i would trust on a turbo engined car, they either contaminate the MAF, flow less air than the OEM, or let through larger particles. (try holding one of up to a light source)

Some of the non-oiled cotton filters are useful.

The standard paper filter is an excellent design, high flowing, with a massive surface area and very good filtering. It is good for 200bhp+

Many of the 'popular' aftermarket filters do nothing for engine breathing at all.

Giving everything a good clean (intercooler etc) and reducing EGR can help with smoke.

Sorry, disagree with you here.

1. Paper ones filter the air, but restrict airflow. Most cars will respond better to after-market filters. Only way to find out, get a power check!

2. You say after-market airfilters can let larger particles through, then non-oiled cotton filters are useful. I would say the whole point of oiling the cotton gauze is to trap the particles. Surely if you can see through it, the air will pass through easier.

3. The MAF can get contaminated by over-oiling. Providing you know what you are doing when washing/drying/oiling, this shouldn't happen.

 

[devonutopia]

I believe that the air getting into the engine has little to do with the air filter. It's the turbo which compresses the air going in to the engine, so it's the turbo which is needing to be adjusted to provide more air - i.e a higher boost pressure, or a higher volume turbo to push more air at the same boost levels.

 

[ini]

The oiled cotton 'panel' filters are effective, but only really of use on a very high bhp monster, and there are very few TDI's 'road' cars over 300bhp.

The foam type panel filters may well be free flowing, but they are not effective filters, in my opinion. When used in a non-panel application they become very useful, as they can be large/dense enough to provide good filtering, and good airflow.

If you can see large chunks of daylight through the filter, you can probably see chipping/wear on your impeller.

The paper filter is a quality item, and as maximum particle filtration is more important to me than 0.5bhp at WOT, i will stick with it. (for the time being, lol)

 

[Yella Beeza]

Only one way to find out, get the car dynoed before/after under similar conditions.

I've got a foam filter on my home dehumidifier, it lets plenty of dust through.

 

[Yella Beeza]

I think, to summarise, paper filters better than cotton gauze (even when oiled), but cotton gauze allows airflow better than paper. Example linky (if anyone can be bothered to read it all!)

http://www.bobistheoilguy.com/airfilter/airtest1.htm

 

[zippyy]

My smoke has reduced since fitting a Green panel filter.

 

[Yella Beeza]

I think it's also generally accepted that fitting the PD160 intake as well helps reduce the smoke.

 

[fk1nrapid]

very intrested in an old thread ive just read about PD160. I've got 55 plate tdi leon and maybe thinking about trying to get one. But where would you get one from. The air intake on my car starts from the n/s indicator and stretches nearly to the middle of the car. It looks like to change the n/s headlight bulbs I would have to take the whole thing off. Surely the car wasnt designed like this.

 

[Yella Beeza]

PD160 is an upgrade for Ibiza models (from the TDi Cupra version). Not sure how it would fit on the Leon.

Might fit at the airbox end OK but not sure about the entry adapter on the front panel. Would have thought it might be different on the Leon. It doesn't interfere with changing the bulbs on the Ibiza. It's the battery that's in the way (on the TDi version anyway).

 

[zippyy]

How much smoke is to much anyway? I can see smoke when I floor it ever since my remap, and I've got dark rear tints.

 

[dajackos]

Ive got a switchable map. In standard no smoke, mid setting has a bit when you boot it under 2k, and fastest map loads of smoke. Mine slips clutch too much in the top map so run on the middle map.