Non DPF diesel family cars?

gilbert_and_sullivan

It's not being dumped in the engine deliberatley, it's the extra fuel being forced by an extra injector after combustion cycle in to aid 'regeneration' and unless that regeneration occurs fully and it would appear to be a hit and miss affair if everythings tickety boo, let alone in the day to day running of a vehicles engine.

This fuel is supposed to cause the DPF to burn and regen, of course the flaming thing doesn't do what it should and the excess goes down the sides of the cylinders into the sump...handy.
Thats my very poor report and considering it's several months since i read the threads think youself lucky i remembered that much..:p

Franke...Hilux doesn't have DPF and is relatively simple for a 57 plate motor...this thread and others similar is why such a vehicle is on our drive, i have evry sympathy with you..that HJ tech mega thread is well worth a read.

EDIT just out of interest one or two chaps are experimenting with running their DPF cars deDPF'd, not a Mazda yet that i'm aware of and i'm awaiting reports.
No i wouldn;t have a car with one either.

frankie

goldspanners wrote: »

f**k me! every day is a school day!

what are mazda playing at with this system?

sorry op, i seem to be the one who is misinformed about mazdas DPF.

I couldn't believe it either Goldspanner. How on earth such a stupid system ever got off the ground defeats logic.

I'll investigate the HJ site.

So, how do 'normal' DPF systems work? What cars have DPF systems that do not dump fuel into the sump?

As I said I don't mind doing an Italian tune up every so often to do a regen as long as my oil is not diluted!!

Also is it necessary to have a car with a DPF when all they are really for is complying with EU directives? Can you still get a good bog standard diesel?:think::think:

Kilty_2

I've heard some cars can do this when they're left for too long without regeneration (GM/Fiat 1.3 CDTI engine can do this) - however it's not exactly the norm! :rotfl:

goldspanners

frankie wrote: »

So, how do 'normal' DPF systems work? What cars have DPF systems that do not dump fuel into the sump?

As I said I don't mind doing an Italian tune up every so often to do a regen as long as my oil is not diluted!!

Also is it necessary to have a car with a DPF when all they are really for is complying with EU directives? Can you still get a good bog standard diesel?:think::think:

a normal DPF shouldn't be dumpng fuel near the sump, its basically a trap in the exhaust tht collects a certain amount of diesel soot and reburns its before releasing it into the atmosphere,some can regenerate it around the engine,some have a heating element inside the exhaust that comes on when the soot reaches a certain level.

diesels without DPF are still available, im sure ford offered the focus and fiesta in variants with and without DPF. the only difference was the DPF model had £35 per year tax, the model without DPF was at the normal rate. (small price to pay for less trouble i say) fuel economy was no different though.

flyingscotno1

goldspanners wrote: »

a normal DPF shouldn't be dumpng fuel near the sump, its basically a trap in the exhaust tht collects a certain amount of diesel soot and reburns its before releasing it into the atmosphere,some can regenerate it around the engine,some have a heating element inside the exhaust that comes on when the soot reaches a certain level.

diesels without DPF are still available, im sure ford offered the focus and fiesta in variants with and without DPF. the only difference was the DPF model had £35 per year tax, the model without DPF was at the normal rate. (small price to pay for less trouble i say) fuel economy was no different though.

I've never heard of such problems with DPFs before reading about the Mazda- that is mad. Only problems I have heard are from drivers who do too many short town runs or those 'eco' models where 6th is too highly geared.

I bought a DPF diesel last year (wasn't much between it and the 1.4T petrol) and I do roughly 10-12,000 a year. Regular to office I do only 2 miles on urban roads with a 30 limit to work, most of my 17 miles is 50+ on motorway and touchwood car is just under 12,000 no hiccups. The DMF worries me more!

Pew_Pew_Pew_Lasers!

I think if I ever buy a car with a DPF that operates in this manner I'll be removing it pretty quickly. I don't want the cylinders in an engine I own to be washed with diesel.

frankie

Thanks for all your comment guys.

Seems I'm between a rock and a hard place. One thing for certain is that I will be moving the Mazda on, for what I just don't know yet. One things for sure though, if I do go back down the diesel route I will be much more aware of the DPF issue.

Hopefully too I've highlighted some potential problems for other Mazda owners to be aware of. Hopefully their cars will run OK, BUT CHECK OIL LEVELS REGULARLY!!

AdrianHi

frankie,
Much I as love our (petrol) Mazda 6 Mazda aren't doing diesel owners any favours.
I think its a cam belt change at 6 years old or 75,000 miles that costs £796 :mad:
See here:

frankie

Thanks for that little gem Adrian.

It has put the final mail in the coffin for my Mazda. I am now looking at a Mazda 2.0lt petrol or a 2.0 PDI Skoda Estate (I need to confirm these don't have DPFs).

I went with Mazda because I got 'emotional' about a previous 626 I had for 10 months old until its grave 17 years later! All I had go on that was a new exhaust, before the tin worm got into the chassis and the clutch finally gave out. It was valued at about £200 so not viable to repair.

Just in a bit of a dilemma on what to go for next.

harveybobbles

The 2.0TDi VAG engine has the DPF...