DPF Filter advice???

Gloomendoom

lottie3000 wrote: »

Hi, The car is a Nissan Qashqui 2 litre Diesel. I do 15 miles to work on the motorway, potter about at lunch time and then 15 miles back home.

I'm actually surprised that the DPF has given problems with this kind of use. The pottering about at lunchtime won't do it any favours but the 15 miles on the motorway each way should be enough for the thing to clean itself.

gilbert_and_sullivan

I too would have thought the car should cope with a 15 mile motorway run twice a day.

However, you've got to admire the way the trade's (and many of their media chums) propaganda has worked, here we are in a situation of many cars being unfit for purpose, where the buyer is assumed to have involved and up to date mechanical knowledge, and ends up to blame for not being engineering graduates when it's their poor designs that can only cope in perfect conditions, and even if they still don't work then the buyer is still to blame.

good wheeze

Gloomendoom

I bet a few engineering graduates have been caught out too. It would never have occurred to my wife.

Retrogamer

Gloomendoom wrote: »

Into an MoT failure. Nice job!

As long as the filter's housing remains, it should be a pass as it's a visual inspection only.

Gloomendoom

Retrogamer wrote: »

As long as the filter's housing remains, it should be a pass as it's a visual inspection only.

Do they check for soot in the tailpipes?

gilbert_and_sullivan

Gloomendoom wrote: »

I bet a few engineering graduates have been caught out too. It would never have occurred to my wife.

Not surprised anyone's been caught out, no matter how mechanically educated they are.
The owner/driver is completely in the dark as to what's going on.

No driver info available for the following:

current condition of DPF
regen required
regen in progress
type of regen
progress of regen or predicted time to regen ending
volume used or left of any liquid catalyst

The owner/driver is totally blind on all this, by design or rather by lack of it, yet because they stopped before a regen they didn't know had started hadn't completed they are wrong...and to put the icing on the cake other car buyers blame them too.

It would help no end if the driver was at least aware that the DPF was getting full and had the ability to request a regen via the car's computer when they, the driver, knows they are about to embark on a suitable journey, and the computer kept them informed so they could avoid stopping the engine (eg by once in a blue moon carrying on to next m'way junction and return) before the regen could complete.

Alter_ego

Gloomendoom wrote: »

Do they check for soot in the tailpipes?

Give the tailpipe a good rodding just before MOT.

spiro

Doing 15 miles on a motorway, it can mean less than 15 minutes at 70mph or 30min at 30mph. A friend who deals in QQ all the time recommends giving the engine a good blast by keeping it in a lower gear and getting the revs right up, doing this once a month or so helps the dpf.

utopia_11

OP maybe better off part exchanging for a petrol. His driving requirements doesn't suit a diesel. In winter months his car would have barely just warmed up by the time he arrives at work. Don't see where his benefitting with a diesel car, they take longer to warm up than petrol engines and around the same MPG as petrol's when warming up. No win for the OP

Retrogamer

Gloomendoom wrote: »

Do they check for soot in the tailpipes?

They can if they want but would be pretty pointless.

Diesels with DPF still have some soot on the tail pipes and soot on the tailpipes isn't part of the MOT guidance / test when i last checked.