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Discussion Starter #1
Finally had enough of the utter mess that is the DPF / EGR on my 159 and considering removal.

Angel are my preferred choice so was just wondering how people, who've used them to remove this nonsense that spoils the 159, found the outcome ?

I realise people only tend to post about -ve experiences as a rule but appreciate all feedback on the DPR remove at Angel

tia,
Mike.
 

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A quick search on here will show that Angel bash out the interior of the DPF. That makes the work cheaper than a replacement straight through pipe. However, those that replace it with the straight through pipe give you the old DPF to keep. You can then either sell it or keep it and change your car back to standard if you want to.

I suggest that there is a small risk that MOT changes may check that the exhaust system DPF is operational and working correctly but that is not a current requirement.

My worry is that DPF removal is becoming more common on ALL makes and as more are removed that increases the likelyhood that the government will legislate against it.

I used Angel to tune my 2.4 10V 156 and that was a rocket ship but it did smoke quite a bit but the 156 10V does not have a DPF.

I have used AHM for the 159 and my DPF is sat in the garage.

The chipped 159 does not feel as fast as the 156 but indicted speeds at known points in the same run show the 159 to have better acceleration.

Feeling slower may be due to:-
the 20V being a smoother engine and the power comes in with less of a bang.
the 20V revs more freely and holds onto it's power into the upper rev range.
it could also be that the better suspension of the 159 makes it feel more controlled and therefore feel slower.
Personally I think it is a bit of all three and not down to AHM being a significantly better chip.

Check the price af a replacement (one day the MOT rules may change) or secondhand DPF (that's what your functioning one is worth) and make up your mind whether having the centre bashed out, selling or keeping your DPF is the right option for you.

Having experienced both would I use Angel in preference to AHM - probably not because AHM also do servicing and maintenance on Alfas and are an Alfa specialist. Angel are first and foremost a chipping company.

It is a close run thing and both have a big reputation to protect so it's really up to you!
 

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Discussion Starter #3
Thanks for that - i was hoping the'yd remove the DPF, do they get rid of its internals as i'd heard it's a hefty piece of sh!te that obviously adds unnecessary weight to the car.
 

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Plus if you wanted to buy a new one to refit when selling the car it costs ££££, much more than the price difference of using a professional tuner who will give you the original back.... if you see where I am coming from.
 

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I don't recall where I saw it but the interior of your DPF is a honeycomb type grid of metal. Angel just smash this to small bits to get it out. The advantage is that the old pipe goes back and the car "looks" unaltered.

But my worry will always be that the MOT rules change and it will need to be refitted and functioning? At that point I suspect any secondhand DPF will double or treble in value. That's for two reasons:-

1. Anybody without one will need one.
2. No one will be removing them anymore and there will be far fewer entering the market.

As said above. You pay your money you take your chance.

Another option is buy a straight through pipe and fit it and have Angel do the tuning.
 

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Maserati Quattroporte
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If your car was registered before 09/2008 it will never need the dpf for the mot. The eu regulations before that date didn't require them.
 

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As of jan next year the mot will check for the dpf and fail if missing. Euro5 standard Came into force in2009 so perhaps pre 2009 cars will not be checked?!? Euro 5 does stipulate the presence of a dpf
 

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As of jan next year the mot will check for the dpf and fail if missing. Euro5 standard Came into force in2009 so perhaps pre 2009 cars will not be checked?!? Euro 5 does stipulate the presence of a dpf
I don't think that's right (but stand to be corrected). I've been looking it up and can't find anything that states a Euro 5 compliant car should have a DPF. In fact, I'd be very surprised if it did as the rules are output spec not input spec. In other words, they set the Particle limits (as well as Co etc) and then manufacturers have to meet those limits. It would be very odd for them to specify how manufacturers should do it as it would stop them investigating better ways.

Also, it came in on 1st September 2009 "for the approval of vehicles" and "shall apply from 1st January 2011 for the registration and sale of new types of cars". No mention of it being tested once the car is sold. This would not be part of the emmissions regulations but part of the MOT testing regulations.

New MOT testing regulations are still under discussions for 2012 so no decisions have been made. However, if they align with EC directive 2010/48/EU then for emissions tests a vehicle will fail if "Emission control equipment fitted by the manufacturer absent or obviously defective". However, in the introduction it says "‘Reasons for failure’ do not apply in cases where they refer to requirements which were not prescribed in the relevant vehicle approval legislation at the time of first registration, first entry into service or retrofitting requirements." So I'd say the relevant date, even if Euro5 does specify a DPF, would be 1st January 2011 i.e. cars registered after 01/01/11 would still need to keep the DPF (but as I say, not convinced even that is required).

So, I take it from that to mean that you can remove the DPF if there was no prescribed requirement for it to be there in the first place. In other words, unless the Euro5 emmissions regs say it has to be there then it's fine to take it off, as long as the car still meets the emmissions limits in the MOT. My guess is they have put that in now so that if EU6 requires a DPF then it has to stay on. They wouldn't normally retrospectively make you do something and this seems to back that up.

As I say, I could be wrong and happy to be corrected.

One thing I did find, which might be of interest to those whose DPFs have failed, is that the legislation says "vehicle manufacturers must also ensure that devices fitted to control pollution are able to last for a distance of 160 000 km."
 

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This will be interesting then to see if the MOT testers pass these cars with DPFs removed. Does anyone have their MOT due in January?
 

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Cheers Alfa tuner!

If I've been good enough this year, Santa says I can come to you in the new year to have mine removed :)
 
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