DPF smoking

[Greg Roles]

Would be unlikely, as I had to belt the living s#&t out of it to break it, it was like a solid piece of pottery, FAR more solid than I had anticipated. It does however sound like a possible scenario, but even if cracked, it;s 180mm long, would take a hell of a fail to have a passage through the entire thing.....

I can get a standalone controller, but will take time.....and you don't really have that......

[davidno64]

Well filled up the next tank of fuel and..., the same. SMOKE!
In fact noticed the car is getting dirty in the rear end. Needing a clean, And in cleaning her ,the dirt was soot.
So I also cleaned/polished the exhaust tips. (Now the are actually shinny). 15 Miniuts drive and theys are
showing signs of soot.

Poped in to see Dad today and let the wife go home. When she drove off in the car, I noticed smoke (moderate
acceleration). What woe, Dad also noticed the smoke. And no he was not looking for it. He's 85 years of age
and leagally blind.

So I think there is a problem. This was created after VW warrented a DPF related repair and introduced a couple
more electrical gremlins. Tuesday, I will be going back to VW and complaining. Hopefully this time I will get the car
repaired correctly and before warrentie runs out.

I will keep you informed.

[Transporter]

The time is not on your side. I would be complaining politely to get it fix. Actually not complaining, just asking them to fix it, is probably better than telling them that they broke it.

Maybe try another dealer.

[benough]

Could the car be injecting unburnt fuel in the exhaust stroke, as per a regen, and it's making it's way through the DPF and burning on the way out?

i.e. It's being burnt past the DPF?

[Greg Roles]

Good theory, and with these DPF's anything's possible, but brown smoke is fuel, white smoke it oil, and well, black soot is well, soot!

If the dealer has been at it, then returning it is indeed your best move!!

[GTREA]

One of my Trucks does this (2008 FSR700 Isuzu), it will smoke when burning off, noticeable at the lights, or especially noticeable if your standing beside the vehicle at the time as you would be dead.

Its just a blown seal between the regen unit itself and the exhaust, will fix next service

[Tuning Dynamics]

Good theory, and with these DPF's anything's possible, but brown smoke is fuel, white smoke it oil, and well, black soot is well, soot!

White smoke on dielses is also un-burnt diesel.

[DkN]

I don't know the reason but interestingly, after my DPF delete but before my regens were successfully turned off, under load obviously black soot comes out, but when the regen becomes active with the DPF light on, when stopped at the lights white smoke will seep out of the exhaust. This never comes under load but as I come to a stop, that is I'm on the brakes not the accelerator, that's when the white smoke comes.

Anyway a blown seal definitely sounds feasible, though I haven't even taken the effort to look at my DPF, it's just sitting in my shed.

[davidno64]

Hi all,

still having trouble with car. Seems likley the DPF has failed.
I did leave a long message but I seem to have lost it. So todays short message/update is.

Visited the Dealer. Very politley, they are playing the blame game. At the end of the month,
car is booked in. Today they would not give it a quick inpection or confimation of fault. Unless
I left the car with them which would cause me to be stranded. Instead they would look at it at
the end of the month.

This is also where the warrentie expires. Forgetting the other issues and timming of it all.
Essentially, the dealer claims" What did I expect, As you drove it after the CEL came on". This also
negates the fact they were advised of the situation and it was agreed to drive and monitor the
situation, untill the booking.

But a point is, it was not smoking at all. Not untill after the Dealer had fixed? the car. Faulty
sensor. But they did perform a DPF regen. This is the first and only DPF regen performed by
anyone or the car itself. I have been advised that the car had been performing micro-regens,
As sometime raised revs at idle to 1000 RPM, with no warning lights.

Although I'll probly keep this car and feel it's well engineered. I dont feel these cars are as
good as the Germans claim. Particulary in this area. I have had less trouble with older and
pommy cars. 2 German cars I have owned from new, have left me less than inpressed.

[Transporter]

Thanks for keeping us updated. I would be keeping the record of the emails with conversation with the dealer and also the communication with the head office. Make sure that they understand that you didn't have the problem with the car until they replaced the pressure differential sensor. They probably did forced regeneration and instead they should've replaced the DPF.

I hope it all goes well for you and they replace the DPF at no cost to you.