Omf - dpf regen light on - B7 Passat TDI

[Transporter]

Thanks Guys, I'll call the dealer for a check -up. Also i noticed the idle RPM was quiet hight at nearly 1k RPM. Do TDI do this? I normally notice it at around 800 rpm.

The increased idle during regen. as well as a bad odour is normal at that time. The active regeneration (activated by ECU) last around 10minutes (the first 10 minutes or so, is to increase the DPF temperature). The speed you're driving is not very critical, try to keep it between 1500-2000rpm by shifting into S mode if you can. What is important is the exhaust temperature, so the engine must be under the load you can help it buy turrning the accessories ON (A/C, heated seats, head lights, window demister). The steady throttle during regen. is also important.

[Inego]

hmmm, I'm thinking the moral of the story is don't buy a TDI!

Nope, I'm happy with my TDI, the only issue being it's mainly used for short inner city trips, so rarely gets up to temp for a regen. I suspect the initial problem with mine was complicated by the fact that it had been a true demo car, so had a had a couple of months of very soft inner city running.

It's been fine since, apart from needing forced regens, as I say, a couple of times a year. If I do go with an alltrack replacement, it will beingteresting to see how a CR engine fares

[Transporter]

Nope, I'm happy with my TDI, If I do go with an alltrack replacement, it will beingteresting to see how a CR engine fares

It SHOULD be all good.

My daughter's MY12 Tiguan TDI 103kW DSG, is driven mainly in the city 7km morning and 7km back in the afternoon, so far so good, I monitor the DPF on regular basis and even under these conditions, she should get at least 200k km from the DPF. She is using Moreys Diesel Smoke Killer at every fill up, though. She also has much better fuel economy than on her last car Golf5 2.0TDI.

[cru22z]

Been driving to the city at peak time so heaps of traffic.
On the way home yesterday the bloody dpf light came on again
During crawling traffic on the M4. I rang the service dept before
they closed as suggested no need to bring car in again and when I get the chance
Drive it hard for half hour. I said that's impossible now in the traffic.
He said just whenever I get the chance. So I hanged up and guess what
even crawling traffic the light went off. I didn't even go fast I was cruising at 10kph.

[Greg Roles]

The DPF will do a regen itself at 40% load. No lights, the only way you will notice is the car get's a little "rough" and the idle usually raises to 1000rpm. This happens all the time without people knowing.

If this fails a few times, and for it to work the regen must go on for a good 10mins, and requires better than 60kph, as the car needs load to reach the magic 500 degree mark, it will throw that DPF light and the instruction at 60%. This is alerting you to the fact you really want to be driving to suit a regen at this point - but donlt stress, the car is nowhere near a major problem at this point. A good 10-15mins of regen and you will be back to "zero".

If this fails enough times and the DPF reaches 80% it will put the car into a limp mode, restrict the boost, and tell you to go to a dealer, where they will force a regen - exactly what you do with a Vag Com cable - and what I do quite often. My DPF is at 106kms and it;s "capacity" is definately reduced - no doubt the Viezu race tune isnlt helping - but I monitor my soot levels with it weekly, and when it nears 40% I often force a regen and go do my DPF lap of hills that helps raise the temps. I have to do this as I have to manually close the intake flap given my major intake mods, but I'd HIGHLY recommend a Vag Com cable - there's one currently for sale on here for $200 which is a good $100 below cost.

Don't stress about your DPF, just go drive, it actually needs throtte and load to raise the temps, it's very interesting to drive around with an EGT gauge for a while - you learn a lot.

Common rail is much better at dealing with DPF's, like Miro suggests running Morleys Smoke Killer in the MKV PD's is a great idea.

I am hopeful a solution to this entire problem will be out soon.

[h100vw]

I am hopeful a solution to this entire problem will be out soon.

Amen!

Got a man that needs one in Sydney Greg, don't spare the horses.

Gavin

[clip]

I am hopeful a solution to this entire problem will be out soon.

TBH, this whole issue *****s me up the wall. What do you need Greg and how much money to help you get this problem sorted and out of the way? I've grown to love the TDI, but there's no way I'll be buying another, and while I'm on the edge of getting a tune, there's no way until this is sorted.

[Transporter]

TBH, this whole issue *****s me up the wall. What do you need Greg and how much money to help you get this problem sorted and out of the way? I've grown to love the TDI, but there's no way I'll be buying another, and while I'm on the edge of getting a tune, there's no way until this is sorted.

Better use his other contact, if you want faster answer. Greg is quite busy.

[cru22z]

Do dpf cars show black exhaust smoke during acceleration?
Anyways I went for a long drive up the mountains.
I feel like a hoon. Every traffic light I'm drag racing

[Greg Roles]

Nope a DPF should not show any soot if it's working properly. I'm lucky to get much black at all on my tips, and I'm at 4.5 years!

I'm getting close to a solution, just at the stage of securing the right core - there is actually quite a range across companies - and test it on my TDI with a few tunes. The upside to all the delay is I have found what I believe to be the perfect core for the application, and the holdup is just trying to get samples out of Asia. Unless you want to order a container load these companies go quiet - may take a trip over there to be honest.

Stuff you Gav , I want to solve my own DPF issue, this has been my longest build on a car EVER.....but it has been an eventful time. Certainly didn't start out with a car business in mind!!