RE: 140TDI DPF with Adblue

[ope126]

Hi All,

Just picked up a Demo with a 1,000kms on the ODO.
Drove from Sydney to Brisbane and performed flawlessly.
Now in the usual day to day driving, I am experiencing an Active Regeneration Self Clean Cycle at some point of my journey.
I can tell as the idle speed increases to around 1050 - 1100rpm.

In my previous 130TDI Highline, it rarely did a DPF Regen (in the same driving conditions).

I only have 2,500kms on the ODO.

Is this usual practice now of the Euro 6 Engines?

What is everyone else experiencing?

[Eaglehawk]

Sounds like you've got a honest diesel engine instead of my naughty diesel engine...

[doc_777]

Deleted

[Gazza]

Hi ope126,
Are you sure it is doing a regen?
I find the idle speed is very dependent on the pressure applied to the brake pedal .
Light pressure will result in an idle speed over just over 1000 rpm, but with a bit more pressure the speed drops to around 800 rpm (assuming you have start-stop de-activated)
Only done about 1600km in my car, and have noticed it has performed a regen only twice; it is very obvious as the radiator fans are going full bore.

[ClassicAU]

What Gazza said. I find in my 130 that it does the same dependent on brake pressure, and I put it down to the engagement of the DSG clutch. The more brake, the less likely it thinks you are to take off again kind of thing. I have yet to notice any form of self cleaning in the year I have had mine. If it is there, then it is not making me aware of it!

[dinot81]

Yes, when regen is undertaken, idle is around 1000rpm and I have noticed a deeper note from exhaust. Most of my regens happen on motorways and under throttle, the exhaust sounds bit louder, kind of a nicer sound.

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof

[sclyde2]

my 140tdi surprised me with its behaviour with the regen stuff. most disturbing is if you arrive home while it is in the middle of it. it makes quite the racket for a while after you turn the engine off - the fans run really loud for a while afterwards. i have lost count of how many times it has run - at around 9k km now. probably a good thing, as i probably don't get enough ~30min+ high speed drives in often enough, which would probably kill a dpf in one of the older engines.

[dinot81]

my 140tdi surprised me with its behaviour with the regen stuff. most disturbing is if you arrive home while it is in the middle of it. it makes quite the racket for a while after you turn the engine off - the fans run really loud for a while afterwards. i have lost count of how many times it has run - at around 9k km now. probably a good thing, as i probably don't get enough ~30min+ high speed drives in often enough, which would probably kill a dpf in one of the older engines.

I would not recommend you interrupt a regen. I have been caught close to home few fimes, as it may sound crazy, continue to drive until finished. Do an extra lap.

The danger of interrupting regens, you could end up with oil thinning (fuel enters oil). Causes an increase in oil levels plus oil loses its lubrication. Very bad for engine. If you have a habit of turning off your engine with regen in process , check your oil level. Plus, can clog the dpf over time if regens are not completed. Be careful with that.

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof

[ClassicAU]

it makes quite the racket for a while after you turn the engine off - the fans run really loud for a while afterwards.

Oh, is that what that is! I always thought it was some sort of turbo timer to cool things down! Shows what generation I grew up in!

I can say that I have gotten to my destination often with this happening, and had my first major service (25,000kms) and inspection passed with flying colours. However I will try and be more mindful of it after this explanation, thanks!

[sclyde2]

I would not recommend you interrupt a regen. I have been caught close to home few fimes, as it may sound crazy, continue to drive until finished. Do an extra lap.

The danger of interrupting regens, you could end up with oil thinning (fuel enters oil). Causes an increase in oil levels plus oil loses its lubrication. Very bad for engine. If you have a habit of turning off your engine with regen in process , check your oil level. Plus, can clog the dpf over time if regens are not completed. Be careful with that.

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof

Interesting. This potential issue applies to the ea288? Do you have a link to some instances where these problems occurred. I often get home not even noticing the Regen is happening until I switch the engine off and hear the fan. From what you describe, VW has designed it in a way that will be difficult for me to avoid issues.

[Umai Naa!!]

Engine fan run-on is pretty normal for VWs. Has been that way for the last 10 years or so.

The idea is to stablise engine temps after shut-off.

[dinot81]

Interesting. This potential issue applies to the ea288? Do you have a link to some instances where these problems occurred. I often get home not even noticing the Regen is happening until I switch the engine off and hear the fan. From what you describe, VW has designed it in a way that will be difficult for me to avoid issues.

If you are referring to oil thinning, this applies to all manufacturers with dpf engines. If they are not maintained, has caused issues all over the world from Audi to Volvo. Have read stories in Germany where engines have been destroyed with less then 10,000kms on the clock as people were not made aware on how to maintain a diesel with dpf. Most of them did shorter trips not allowing oil to reach operating temeperature. In those cases if a regen is required with a cold engine, it will inject additional fuel into combustion chamber to raise the temeperature (most cars need a minimum of 600 degrees C. If you reach your destination and interrupt that process, due to cylinder walls not being at operating temp, the additional unburnt fuel stays on the walls without being able to evaporate (low temp in chamber) and on the next start, oil will pick it up and you end up with oil thinning over time if repeated all the time. Its visible by increase of oil on dipstick. Looks like your engine producing oil. So, if that level goes beyond limits, can end up in the turbo and once the mixture reaches combustion chamber, engine commits suicide by revving itself to death. Imagine a diesel engine revving way past the limiter and cannot be shut down even if you turn off the key. Those unlucky ones are still in battle through Courts as has voided warranty and were never explained about issues by sales people. The manual says not to use for constant short distance driving and if so, engine will need higher speed driving from time to time.

In terms of regens, I can only say about mine that exhaust note is louder and idles at 1000rpm when in coasting mode or I happen to be at the lights. Have not driven another dpf diesel long enough to be present during a regen.

Another thing you can have a look if your service interval, they start with 365 / 730 days and 15k & 30k kms. If the inspection reminder reduces the days, not exactly following the oil change interval, car is picking up that not being driven ideally.

Hope above makes sense, sorry about if any typos, wrote on my phone. Above info obtained from German forums and stories when researched dpf problems people had.

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof

[dinot81]

Here is a website I found dedicated to dpf problems:

403 Forbidden

2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof

[Asahi1985]

Just read this thread. I have had my 140 for a few days now and today the fans kept going after shut down. I thought it was a turbo thing but after coming across this I'm not so sure.

Could anybody please tell me how I know for sure if my car is going through this cycle?


Also would anybody be able to give me a few tips on how to care for my engine? From what I have read the diesels need an occasional long run is this true? Is it beneficial to give it some beans here and there through the gears and blow the cob webs out? Any information would be greatly appreciated. Thanks.


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[dinot81]

Just read this thread. I have had my 140 for a few days now and today the fans kept going after shut down. I thought it was a turbo thing but after coming across this I'm not so sure.

Could anybody please tell me how I know for sure if my car is going through this cycle?


Also would anybody be able to give me a few tips on how to care for my engine? From what I have read the diesels need an occasional long run is this true? Is it beneficial to give it some beans here and there through the gears and blow the cob webs out? Any information would be greatly appreciated. Thanks.


Sent from my iPhone using Tapatalk

If your trips are long enough to get oil to operating temperature and keep an eye on idle revs before shutting down (air-con off). If idles at around 1000rpm, likely doing a regen. With fans running after shutdown, can also be just cooling down. Had that happen once in 2 years since buying mine but it was after driving in close to 40 degree heat.

Regen occurance depends also on quality of diesel that you fill up. BP Ultimate is the only one in Oz being close to european standard, followed by Vortex Diesel. Anything else is crap in my view.

There is no need to trash the engine just to blow cobwebs out, 110kph on motorway does the job. Do 30-40kms trip at least here and there, maybe at least once a month. Diesel engines are not really built for suburban driving, they are long-range engines and need regular exercise.


2015 Tiguan 130TDI R-Line, Pepper Grey, Panoramic Sunroof