Hi Guys,

When the DPF regenerates do you tend to see a cloud of smoke from the exhaust?

My 56 plate vRS TDI regularly emits a significant cloud of smoke particularly when I have been running at the 2-2500 RPM mark for a time.

Cheers,

Bob

It has been reported that the engine will idle a little higher than normal and feel a little rough at the same time.

This is presumably done to get the DPF up to the regenerating temperature.

As for the clouds of smoke? you'll need Skoda to look it over and tell you whats going on, if you have no luck with the dealer your best bet is to speak to Skoda customer services.

If regen is running you may well see a something from the exhaust. Any issues with the DPF system will show up a warning light.

The DPF light will also show if the car requires you to drive specifically so clear the DPF. Oddly enough not trashing the nuts out of it as some people believe. 2000rpm, steady throttle.

Thanks for the advice guys.

I assume that you would only carry out the DPF regeneration procedure if the DPF light comes on? Because of the motorway driving I do I haven't seen the DPF light come on. Sounds like the smoke (which is noticeable in the rear view mirror at 70mph) is not normal. Will get dealer to look at it tomorrow.

You dont need to do anything unless the light comes on no.

But if at some point you can find a couple of mins to drive at around 2krpm then the soot will drop down in the dpf anyhow.

But if at some point you can find a couple of mins to drive at around 2krpm then the soot will drop down in the dpf anyhow.

That has been suggested to me as a 'preventative' measure; but it has to be 1,800 to 2,000 rpm in 4th (40mph) or 5th gears (58mph). Doing 58mph in 6th or 40mph in 3rd won't work!

Is there any reason why this DPF regeneration has to be done in 4th or 5th gear? 2000rpm in 6th is 70mph which is a reasonable thing to do as I cover a lot of motorway miles. I guess slipstreaming some trucks at 56mph for a while should do the trick?

Having said all this I have only seen the DPF light once in just over a year and 37500 miles and that was last week when the Engine light had been on for 3 days and the car was running rough as old boots:thumbdwn:

Is there any reason why this DPF regeneration has to be done in 4th or 5th gear? 2000rpm in 6th is 70mph which is a reasonable thing to do as I cover a lot of motorway miles. I guess slipstreaming some trucks at 56mph for a while should do the trick?

Its a factor of engine load and the requirement to overfuel to get the DPF temperature up and the soot burnt off.

Doing 1,900rpm in 5th = 58mph worked for me this morning. I had the benefit of the RAC man's Laptop (briefcase size really) connected up; initially showing DPF 54% full (sooted up) and progressively getting the soot burnt off and going down all the way to 0% over about 10 miles.

What I know from our german forum, the regenerationproces will start at about 2250 and will be stopped if the motor turns more than 3200.

So too quick, as well as too slow wont do it.