DPF - Whats the point??? They are problematic...
DPF - Whats the point??? They are problematic...
Author
Discussion

Tyson1980

Original Poster:

712 posts

178 months

Friday 19th August 2011
quotequote all
Volkswagen, Mazda to name a few...

These brands have very very good diesel motors which are blighted by DPF failure..

Over higher miles it becomes even more abundant..

I was looking at a 2.2d Mazda6 to replace the wifes Fabia VRS. But the DPF problems have put me right off.


CraigyMc

18,089 posts

258 months

Friday 19th August 2011
quotequote all
What's the point?

They filter out particulates.

Tyson1980

Original Poster:

712 posts

178 months

Friday 19th August 2011
quotequote all
CraigyMc said:
What's the point?

They filter out particulates.
DPFs as I understand it were invented to make the air we breathe less polluted - very laudable, but unfortunately the inventors failed to finish the job

y2blade

56,260 posts

237 months

Friday 19th August 2011
quotequote all
they are needed to meet Euro 4 Emissions and onwards

y2blade

56,260 posts

237 months

Friday 19th August 2011
quotequote all
Tyson1980 said:
Volkswagen, Mazda to name a few...

These brands have very very good diesel motors which are blighted by DPF failure..

Over higher miles it becomes even more abundant..

I was looking at a 2.2d Mazda6 to replace the wifes Fabia VRS. But the DPF problems have put me right off.
just buy a Euro 3 Diesel instead then....DPF is for Euro 4 standard onwards

rswift

1,181 posts

197 months

Friday 19th August 2011
quotequote all
Been looking into these on modern Peugeot's well 2004 vintage. They call them FAP's ... google it, there are plenty of people that will remove it and re-set the ECU for £200. Peugeot actually offered a dpf and non dpf version of a 307 in the same year, as they had run out of stock apparently !. Not sure about the Mazda, but Peugeot/Citroen also requires about £80 of fuel additive every 50K or so .. Dealer fit !

NHK244V

3,358 posts

194 months

Friday 19th August 2011
quotequote all
So have i got this right? a DPF is there to trap particals of soot, it then regenerates (usually on the motorway) by dumping all the collected soot?

Harji

2,224 posts

183 months

Friday 19th August 2011
quotequote all
Something for the pub when all the diesel owners (who drive in town a few miles) chirp on about how environmental they are.

So by removing the DPF, are the cars then going to fail emissions tests?


HellDiver

5,708 posts

204 months

Friday 19th August 2011
quotequote all
DPF problems are almost exclusively due to morons buying 170hp diesels for the 1 mile trip to drop the kids to school, followed by the 2 mile round trip to Tescos for the shopping. The engine never warms up, and the DPF gets sooted up in a few months, never getting a chance to regenerate.

Monty Python

4,813 posts

219 months

Friday 19th August 2011
quotequote all
NHK244V said:
So have i got this right? a DPF is there to trap particals of soot, it then regenerates (usually on the motorway) by dumping all the collected soot?
It burns off the soot particles, emitting a small quantity of CO2.

Kaelic

2,718 posts

223 months

Friday 19th August 2011
quotequote all
Harji said:
Something for the pub when all the diesel owners (who drive in town a few miles) chirp on about how environmental they are.

So by removing the DPF, are the cars then going to fail emissions tests?
Had the DPF removed on my Brera and it just passed an MOT so no problems there


Kaelic

2,718 posts

223 months

Friday 19th August 2011
quotequote all
HellDiver said:
DPF problems are almost exclusively due to morons buying 170hp diesels for the 1 mile trip to drop the kids to school, followed by the 2 mile round trip to Tescos for the shopping. The engine never warms up, and the DPF gets sooted up in a few months, never getting a chance to regenerate.
Exactly this!

They shouldnt be fitted to little run around diesels imo as they dont get the change to regen when they are pottering about the city


D_G

1,891 posts

231 months

Friday 19th August 2011
quotequote all
HellDiver said:
DPF problems are almost exclusively due to morons buying 170hp diesels for the 1 mile trip to drop the kids to school, followed by the 2 mile round trip to Tescos for the shopping. The engine never warms up, and the DPF gets sooted up in a few months, never getting a chance to regenerate.
Also the car needs a special low ash engine oil to be used on most cars, if normal oil is used on the servicing they soot up much quicker.

frosted

3,549 posts

199 months

Friday 19th August 2011
quotequote all
Tyson1980 said:
Volkswagen, Mazda to name a few...

These brands have very very good diesel motors which are blighted by DPF failure..

Over higher miles it becomes even more abundant..

I was looking at a 2.2d Mazda6 to replace the wifes Fabia VRS. But the DPF problems have put me right off.
What do you base this on ? It seems helldriver only posts on these diesel are crap threads . Don't believe the hype , dpf s are not bad and if they do go wrong then you can blank them out + a map for 600 quid all in .

Targarama

14,715 posts

305 months

Friday 19th August 2011
quotequote all
HellDiver said:
DPF problems are almost exclusively due to morons buying 170hp diesels for the 1 mile trip to drop the kids to school, followed by the 2 mile round trip to Tescos for the shopping. The engine never warms up, and the DPF gets sooted up in a few months, never getting a chance to regenerate.
A neighbour recently bought a 2.0TDi Audi Q5 - it replaces an X3 2.5 petrol (which sounded much nicer). The old car did 28,000 miles in 6 years, the new one will be used for a 1.5 mile each way school run and popping to the shops. Any bets on how long it takes the DFP light to come on?

11110111

612 posts

222 months

Friday 19th August 2011
quotequote all
frosted said:
Tyson1980 said:
Volkswagen, Mazda to name a few...

These brands have very very good diesel motors which are blighted by DPF failure..

Over higher miles it becomes even more abundant..

I was looking at a 2.2d Mazda6 to replace the wifes Fabia VRS. But the DPF problems have put me right off.
What do you base this on ? It seems helldriver only posts on these diesel are crap threads . Don't believe the hype , dpf s are not bad and if they do go wrong then you can blank them out + a map for 600 quid all in .
common knowledge tbfrank. Mate (real mate, not just pub gossip..) had it go on a high (c.80k) miler BM 325td... he was only using it for short journeys whereas the previous owner was using the car for a motorway cruiser.

less than 3 months after buying it, guess what... DPF delete and remap

Caulkhead

4,938 posts

179 months

Friday 19th August 2011
quotequote all
y2blade said:
they are needed to meet Euro 4 Emissions and onwards
The Fiat 1.3 Diesel turbo in the Panda and so on meets Euro IV without a DPF.

When I bought my Fiat Doblo as a short journey runabout on the Isle of Wight (where you can never get very far!) I conciously specced the 105bhp version of the 1.9 multijet engine because it doesn't have a DPF, variable turbo or DMF to go wrong.

HellDiver

5,708 posts

204 months

Friday 19th August 2011
quotequote all
frosted said:
It seems helldriver only posts on these diesel are crap threads . Don't believe the hype , dpf s are not bad and if they do go wrong then you can blank them out + a map for 600 quid all in .
Its HellDiver. Not Driver. 5000-odd posts and I only post in diesel threads? Really?

Blanking out a DPF? I think you're confusing with EGR which is a totally different thing... rolleyes


frosted

3,549 posts

199 months

Friday 19th August 2011
quotequote all
HellDiver said:
Its HellDiver. Not Driver. 5000-odd posts and I only post in diesel threads? Really?

Blanking out a DPF? I think you're confusing with EGR which is a totally different thing... rolleyes
You sure about any of those points you tried to make ?

HellDiver

5,708 posts

204 months

Friday 19th August 2011
quotequote all
Quite sure, thanks.

You can bypass, or knock the guts out of a DPF. Blanking it would block the exhaust... silly