Purchased Doblo 1.9 JTD 2006 4 weeks ago. Just to transport my handicapped Husband and Mobility scooter to and from town (10 mins away). 3 Days ago I got warning message "engine failure" After garage tow and check it was a blocked particulate filter. I have since learnt that for my needs I should not have purchased a car with said filter as it will continue to be a problem. I have just seen an addative product "JLM" to eliminate filter blockage. Does anyone know of it? or another solution not requiring mad dash up the motorway every week to burn up the deposites.

Hi

The dpf will still collect particulates even if you do use an addative it will still need to refresh itself.

I have found with mine the best things is to drive it fairly hard getting the revs up to about 3000rpm with a warm engine to help things along in the exhaust. Not all the time just once in a while.

The car behaves differently when the filter is burning off soot too. We find that when its in the burning process it judders when going around bends in low gears or pulling away slowly. You will also notice when its burning if you rev the enigine gently and let it idle again it sounds like the engine is eating itself, very rough.

If you notice any of the above make sure you don't just turn off the engine as this is how they get blocked. ideally you want to drive keeping it around 2000rpm for it to finish.

I live near the motorway so just nip on once a week and go up a junction and back and this seems to work for us.

Hope that helps.

if you have a look around on this site the very same subject has been talked about. personally i would be finding 1 of the people offering to take it off & take the guts out & sort the ecu out.
if you are worried about emissions & the planet china india & the usa are sorting that out :slayer::bang::yuck:

ask your garage to check for software update(s)

I notice regeneration through the instant consumption on the computer. I was doing (very) naughty speeds on the way home on Thursday night and when I turned off the dual carriageway onto a 40 limit road the consumption was awful. A fairly rapid burst of accelleration (and revs) seemed to blow out the crap and consumption returned to normal.

Essentially, you need to drive at high(ish) motorway speeds for 30 mins every week or two to clean it out I think.

Miznoma7, I doubt it will be any comfort to you, but cars from many manufacturers are suffering from this specific problem, including many whom have automatic regeneration built into their engine software which is supposed to eliminate it happening.

Its always been the same for cars, short journeys generally don't do a car a lot of good as the car never gets up to temperature, and over time this can effect, oil, coolant, hoses, brake fluid, brake linings and discs, exhaust, glowplugs, turbos even tyres. You name it it can be effected by never getting up to design temperature.

I remember when we still had our family garage over the years we had plenty of customers whom had problems with their cars as they only used them for short journeys. Its a very common problem.

A mate of mine two weeks ago broke down on the A12 using his mums 4 year old Japanese car (I can't remember the exact model) . She only uses it for about 40 miles a week all made up of 5 minute trips to the shops. On the first sensible journey it had done in about 2 years a hose failed. It has done just over 10000 miles.

When as a junior mechanic you see your first car engine partially clogged with emulsified oil, its bought home to you fast what a problem short journeys can be.