Quote:
Originally Posted by bodgit
From the AA
How do they work?
Diesel Particulate filters (DPF) or ' traps' do just that, they catch bits of soot in the exhaust.
As with any filter (think of the bag in your vacuum cleaner) they have to be emptied regularly to maintain performance. For a DPF this process is called 'regeneration' – the accumulated soot is burnt off at high temperature to leave only a tiny ash residue. Regeneration may be either passive or active.
Passive regeneration
Passive regeneration takes place automatically on motorway-type runs when the exhaust temperature is high. Many cars don't get this sort of use though so manufacturers have to design-in 'active' regeneration where the engine management computer (ECU) takes control of the process.
Active regeneration
 When the soot loading in the filter reaches a set limit (about 45%) the ECU can make small adjustments to the fuel injection timing to increase the exhaust temperature and initiate regeneration. If the journey's a bit stop/start the regeneration may not complete and the warning light will illuminate to show that the DPF is partially blocked.
It should be possible to start a complete regeneration and clear the warning light simply by driving for 10 minutes or so at speeds greater than 40mph.
Im not a mechanic but wondered if you removed the PDF could you use a Hot air gun or blow lamp gently to create the high temp mentioned to clear the soot away. You would need to confirm this with a proper mechanic first.
You say you have only had the car 4 weeks so it can be reasonably assumed that this problem was on the car before you bought it as it has built up enough to light up the dash warning so that would help in the courts. |
no you need extreemly high temps. that can not be achieved by doing that.
speaking on fords they will self gen in around every 300 miles, town driving on deisels is a big no no now, they need a good thrash which im sure danny has done.
Quote:
Originally Posted by shanks
Has rhe same issue on the in laws citreon
It's as bodgit quoted the particulate filter will be blocked as the car will have failed to run through the cleansing cycle by on running short trips
At first I changed the ellinis fluid which is the stuff a citreon squirts into the mix during the cleansing cycle to raise the exhaust temp sufficient to burn the build up in the filter
Dealer quoted £700-800 for doing this!! I got a kit for £100 and did it myslef
Not saying that's yr solution though
You could try getting it really hot I.e run it in say 2nd gear up the motorway at full rpm right up to red line and hold it there for a good 10-15 minutes - only way it may get any near hot enough
Spoke to a mechanic I know (a very good one) and he said he had similar issues with other diesel cars and they r a right pain to sort
The chap that mentioned cutting it out n replacing with a piece of pipe has the easiest n best solution really - though that means more cost
Otherwise get straight onto trading standards but imagine it will end up in anoint drawn out process and it's obvious the garages are struggling to sort it anyway !
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blody ell we replace the full cats for that? topping up the fliud is around 150 tops,
cutting out and replacing is a fools idea, the presure sensors on them know there is nothing there and put in a fault code