NEW MOT regulations in May 2018 - DPFs!

[dtr]

Hi, is there any information what exactly would need to be done to pass the cars w/o particulate filters through please?

We have two. One, '07 EOS EuroIV still needs mapping (just recently had the physical work done due to failure). I was going to try it myself and just kill the DPF switch in map, and maybe reduce EGR at higher loads for better economy. Now I am worried it may need further / complex tweaking to pass the smoke test?
While I could put one back in VAG ones are really expensive for RHD cars and I fear it may not last due to whatever reason the old one failed.

Same would apply for early '08 JAG XF EuroIV, that was already done "professionally" by prev owner. EGRs are totally missing so will have to install dummy ones over blanking plates. Would that be enough?

Car 3 (59 CR passat) still original but VCDS reports 168 ml (out of indicated 175ml max in the yellow pop up)! Now is that actually going to become another big headache imminently? I don't fancy EuroV surgery.

Thanks.

[autoden]

Do we know HOW the vehicle will be tested for DPF? Will it be done by emission testing nox or by dlc. Just curious.

[dtr]

From what I've heard it is not finalised yet, but it will be brought pretty much in line with EU MOT standards. They may test for exhaust gas opacity - while smoke of any colour will be automatic fail. They may also attach an OBDII scanner to check for DPF existence. Obviously physically tampered DPFs will fail test. (Mine look legit from the visible side with all cables intact - I doubt they would dissemble anything including removing undertray). I have not seen anything regarding NOx so far.

Source
https://www.gov.uk/government/public...al-assessments
http://www.autoexpress.co.uk/car-new...or-diesel-cars

[norman1967]

I heard a backpreassure test will be applied

[Meat-Head]

Well cover obd plug, and if changes to fail no obd, some old pre 1996 dont have them or remove obd fuse

sear h "garage wire" on twitter or google

[Dunker]

Ive already had enquiries about building emulators for test station emmissions tester probes. Its all gonna be fun and games.

[Meat-Head]

In theory dpf and egr. Are good ideas but in reality there doing more damage than good, assuming not turned into a housing estate drive down motorway dump unneeded hydrocarbons on fields, buy from supermarket and eat them

[dtr]

I heard a backpreassure test will be applied

Would it be measured via OBDII or with physical device?

If OBDII can a good remap simulate proper values? I guess physical measurements would be game over...

[tehnosoftex]

If they will measure the differential pressure under real value on obd2 it can tell that the dpf is missing.

[windy1603]

Draft manual just states smoke test to value shown on homologation label (or 0.7m-1) and any visible smoke on DPF equipped vehicles is a fail

https://www.gov.uk/government/public...al-assessments