Hi all

Im wanting the DPF bypassed but i only know of one place in the north east, vasstach but they are wanting to charge £350 (and that price was based on a passat, so it could be more)

Any one else know who does these in the north east?

Have you spoken to Paul Murray? (RS Tuning) speak to him tell him Dan(who built the oem ecu itb'd 172 with Russ sent you)

Isn't both this and cat removal going to be an issue with mot's very soon?

I've been informed that if they are a standard fitment, the mot inspector will be looking for it/them.

Please feel free to correct me if I'm wrong

Edited 22 January, 201214 yr by Mr Ree

2012 MOT changes require that if a car is fitted with DPF from new then it must be present during the test. i guess a way around this is to retain the original pipework so it looks like the DPF is still present whereas the DPF has in fact been removed from the exhaust. I believe it will only be investigated should the car fail the smoke test, at which point its absence will be apparent.

2012 MOT changes require that if a car is fitted with DPF from new then it must be present during the test. i guess a way around this is to retain the original pipework so it looks like the DPF is still present whereas the DPF has in fact been removed from the exhaust. I believe it will only be investigated should the car fail the smoke test, at which point its absence will be apparent.

Virtually confirms what I thought then.

I was looking at EGR by pass, but have been told not to bother for much the same reason.

Virtually confirms what I thought then.

I was looking at EGR by pass, but have been told not to bother for much the same reason.

I was on the phone to Skoda warranty the other week and asked them about this, as if it was to block up for good they would not replace it as its a 'filter' so i asked about taking it off and they said nothing about failing MOT's

If it does block up im not paying £1000 for a new one (dealer price)

I was on the phone to Skoda warranty the other week and asked them about this, as if it was to block up for good they would not replace it as its a 'filter' so i asked about taking it off and they said nothing about failing MOT's

If it does block up im not paying £1000 for a new one (dealer price)

I'd suggest that you seek expert advice from someone who proffesionaly knows what the score is, i.e. an actual mot tester.

I'd also been considering going for some sort of de-cat system, but that's also going to be a no no now too it seems.

Edited 22 January, 201214 yr by Mr Ree

Ill give VOSA a ring and see what they say, after all they set the rules

Ill give VOSA a ring and see what they say, after all they set the rules

Excellent plan. Do let us all know what they say.

Going to be many unhappy teddies out there with aftermarket headlight conversions too apparently.

I had my DPF removed when I had mine remapped. In fact all they did was remove the internals. I looked into this and was ok with it as any research I did came to the same conclusion. The new MOT inspection will be just a visual check that the DPF is physically there. So no issues if you have it's guts ripped out 😃

I had my DPF removed when I had mine remapped. In fact all they did was remove the internals. I looked into this and was ok with it as any research I did came to the same conclusion. The new MOT inspection will be just a visual check that the DPF is physically there. So no issues if you have it's guts ripped out 😃

Been on the phone to VOSA and they have told me that its 50/50 to if it will fail an MOT emissions test

So if it is remapped, it will be kicking out higher emission reading and fail?

Im completely at a loss of what to do now, i dont want it to fail as its going to be a pretty penny to put on back on.

Been on the phone to VOSA and they have told me that its 50/50 to if it will fail an MOT emissions test

So if it is remapped, it will be kicking out higher emission reading and fail?

Im completely at a loss of what to do now, i dont want it to fail as its going to be a pretty penny to put on back on.

Diesels do NOT have an emmisions test only a smoke test!

Technically a smoke test is an emission test, smoke is an emission from the engine.

Diesels do NOT have an emmisions test only a smoke test!

this is the illusion i was under and asked the VOSA woman, ''they only conduct a smoke test dont they?'' and she said this still reads emissions just not on the same level as a petrol, so yes its still technically an emissions test

Simple answer, don't get a remap, or more the point a smokey one?

I maybe missing the point but a DPF is just a big metal filter that is designed to clear itself when it gets hot.

It if clogs itself why wouldn't removing from the car and heating/baking it to a high temprature not clear the fillter and enable it to be refited to the car?

High temp like 700 degrees?

Might work I suppose.

My oven only goes up to gas mark 9? But its fan assisted so I can reduce the cooking time . . . .

I maybe missing the point but a DPF is just a big metal filter that is designed to clear itself when it gets hot.

It if clogs itself why wouldn't removing from the car and heating/baking it to a high temprature not clear the fillter and enable it to be refited to the car?

Diesel soot is, carbon but also small amounts of ash. Regeneration typically runs some extra intake air (lean mixture) and drops some urea in to reduce the temperature at which the carbon burns off. Problem is that over time, the non carbon impurities from the diesel fuel and from engine oil being burnt, build up and eventually clog the filter to the point where it cannot flow enough exhaust gas even after a regeneration cycle. The ash is not combustible so it stays in the filter.

As far as I can tell, the myth that seems most popular is that the car needs to be driven over a certain speed (typically above 38mph or advocated as a good thrash) to clear the filter. Problem is that regeneration needs to run at the same time as the elevated speed running. Just taking it for a thrash is not necessarily regenerating the DPF. On the Mini, the DPF regen seems to come in randomly, roughly every 350 - 400 miles. It is often the case that you can drive 200 miles at speed and the car will run a regen right near the end of the journey or the beginning of the following days journey, so just running at speed does not regen the filter.

Poxy troublesome expensive things if they go wrong. They are not needed for the MOT but you do need to pass a smoke test and that will be 50/50 without the filter in place.

Chris

Diesel soot is, carbon but also small amounts of ash. Regeneration typically runs some extra intake air (lean mixture) and drops some urea in to reduce the temperature at which the carbon burns off. Problem is that over time, the non carbon impurities from the diesel fuel and from engine oil being burnt, build up and eventually clog the filter to the point where it cannot flow enough exhaust gas even after a regeneration cycle. The ash is not combustible so it stays in the filter.

As far as I can tell, the myth that seems most popular is that the car needs to be driven over a certain speed (typically above 38mph or advocated as a good thrash) to clear the filter. Problem is that regeneration needs to run at the same time as the elevated speed running. Just taking it for a thrash is not necessarily regenerating the DPF. On the Mini, the DPF regen seems to come in randomly, roughly every 350 - 400 miles. It is often the case that you can drive 200 miles at speed and the car will run a regen right near the end of the journey or the beginning of the following days journey, so just running at speed does not regen the filter.

Poxy troublesome expensive things if they go wrong. They are not needed for the MOT but you do need to pass a smoke test and that will be 50/50 without the filter in place.

Chris

Thanks Chris, well been speaking to a few friends, all are saying it will pass but im going on word of mouth

Apparently the MOT rules changed in 2008 when it comes to diesel smoke tests;

For vehicles first used before 1 July 2008: ·

for a non-turbocharged engine, more than 2.50m-1

for turbocharged engines more than 3.00m-1.

and my partners friend has a Leon with the same BNM engine as mine and has a DPF delete and also runs 228bhp, last MOT readout was 0.3 (a fail being over 3.00) so i think im good to go

For completeness, for vehicles first used on or after 1st July 2008 the smoke test level must not exceed 1.5m -1, so it would appear that as long as there are not underlying problems with the engine, a DPF deletion should not be a problem come MOT time.

Chris

Mine passed with a reading of 1.5.