Hi ,just purchased a new Skoda superb executive 2.0,auto,diesel

.What should my rev counter show me when idling?have done 1000mil already . I always thought that 750 is normal,but it shows 1000 and in my opinion is too high.thank you in advance

If it's carrying out a regen (or trying) 1000 is normal.

Is it in Sport mode ?

hi , no its not on sport , and i  wouldnt think its regen as its done 1000miles already .

My first thought was regen. Does your stop/start still work during these periods of 1000rpm? Following paragraph taken from the EA288 self study programme. 'The ECM automatically initiates an active regeneration if there has been no regeneration – or no successful regeneration – in the last 465 miles, regardless of the load condition of the diesel particulate filter. “Mileage regeneration” is used as an additional safety system to keep the load condition of the diesel particulate filter low.'

 

My 150 diesel idles at approx 750-800 rpm unless on regen when it idles at approx 1000 rpm

I've had one regen on PDI so don't think mileage is a factor.

System start/stop i never use , on traffic lights engine is always on - 1000rpm is it normal then ?    I am confused as why skoda dealers aint got clue about this at all ?! they never mentioned that this could be a option for high idle...

Mine did a lot of regens at the start and has since settled down.  What kind of mileage are you doing?  Motorway or urban?

All the talk on this forum about 1000 rpm idle confirms it has only been seen during a regen. That leaves you with the info that 1000 rpm all the time is not usual and needs checking out with your local service people if that is what you are experiencing all the time.

 

Only other thing I can think of is that the climate control blasting at full bore can sometimes cause a higher idle speed in cars but note I am not saying it does with the the S3.

If you are running aircon or seat heating etc (read energy hungry option) then the car will raise the rpm to 1000rpm (especially when the engine is cold) to allow the altenator to assist the battery in providing the required current to the system. This is normal activity.

In your case I would think it is likely a regen. The car will try to carry an active regen out every 600km /645 miles and if you interrupt those Regens the car will keep trying every journey until it hits a back pressure limit high enough to activate the DPF light on the dash!

Try driving with start stop activated for a few days (never mind how much you hate it) as that will auto cancel if a regen is started or is in progress & your revs will rise to 1000rpm. Start stop is unavailable will also be displayed on the cars info screen when this happens. How I wish it just said "Regeneration of DPF in Progress" rather than start stop is unavailable (as it does) as I think that would be very useful for those of us in the know! I might be able to change my driving style to assist it rather than heed it's progress etc.

On new engines, Regens do happen very regularly (200-400 miles) but then settle down around the 1500 mile mark. I have about one every tank of fuel now so about 600-700 miles. If my vehicle use was more suited to low soot build up that would be every 2-5 tanks of fuel as passive Regens can do the job just as well and without the excess fuel usage an active regen requires.

If it's not a regen and you don't think it's a high load requirement (seat heaters + high speed aircon fan + front & rear windscreen heating etc), try gently blipping the throttle in neutral the next you come to a stop at the lights. If the rpm drops then the ecu has had a minor hiccup and there is nout wrong with your car.

Finally (& potentially the most likely culpret if your car was a manual... which it isn't), is that the clutch pedal is not fully depressed to the floor. If the pedal is raised passed a certain point from the max depressed position (i.e pre bite point), the ECU raises the rpm to 1000 rpm to prevent/ reduce the likely hood of you stalling the car as and when the bitem point is reached. This is an excellent feature as it means low speed manoeuvring requires zero throttle input from me the driver unless on sloping ground.

If your car continues to idle at 1000 rpm otherwise, I would be ting to it to a dealer for a check up.

So happy that this forums exist and people do share their knowledge thank you for all your advice!!! I will be taking everything on board -and will be looking at the car behaviour.hopefully everything settles and its just a regent only did two motorway runs-around 500 miles one way..most of my journeys are 10min one way to work and 10 back first week was ok at 750 and then its started to high idle.i have spoken to my dealer and first they said if its a software issue,but then checked on liketolike car and apparently its same..

so as you can see not much of a help and explanation from my dealer Thanks again for help !! !!

last question so how will regen affect engine resources? Is it rather positive for long term ?

Ideally your driving routine should incorporate the correct driving style so regens are not noticeable. Steady throttle application at 2,200 rpm is ideal.

@blahde.

 

600km /645 miles 

 

You got some country miles in that methinks. Isn't it 750km/465 miles for each mileage regen?

If you spend most of your time cruising at over 40 mph the DPF should get hot enough to burn soot off just from normal engine exhaust so there will be no sign the regen is happening at all. If you spend a lot of time in stop-start traffic or do lots of short trips one after the other without the engine getting to temperature for a decent percentage of the trip you'll see the idle rpm rise to increase exhaust temperature and force a regen. The last time I noticed my car regen was while driving for over an hour in very very slow traffic probably a year ago at this stage.

@blahde.

600km /645 miles

You got some country miles in that methinks. Isn't it 750km/465 miles for each mileage regen?

Ok ok.... rumbled I have been!

It was an incredibly rough math guess at converting Kms to miles. Yes, I was a wee bit off but I'll blame the couple of bottles of beer I'd had and the fact I'd been up nearly 20hrs!!

The regens should happen approx once a tank (it does with mine anyway), and as I'm regularly seeing 600+ miles per fill up that's what I based it on.

That raises another question, why then did I think 600kms was 600 miles?

I give up, I'm off to bed now anyway as thats another 19hr day coming to a close and I'm hooped!!

Edited 2 September, 20169 yr by blahde2