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Engine lumpy idle/tickover


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#1 markticktock

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Posted 02 July 2009 - 19:09

Anyone had /have this?

On idle/tickover the engine seems to 'miss a beat', sometimes quite noticeable through the driver seat. The idle does not 'rev on it's own', just sits at aprox 750rpm. Does it when engine is cold or warmed up.
I took it to local dealer,paid for a diag, but because it does not show any fault codes they don't know either!
Car is under Skoda Approved Warranty, but they won't fork out for diagnostic work to be done to find what is the cause.
So far i have changed the air filter, spark plugs,new PCV, cleaned the MAF and replaced all 4 coil packs.Also run some injector cleaner through it.

Anyone with the same problem? Had it fixed? Any help, as it is driving me mad trying to pin it down.:confused:

Edited by markticktock, 02 July 2009 - 19:59.


#2 Organist

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Posted 04 July 2009 - 10:18

Quite often it is the alternator 'coming on line' if the battery is calling for more oomph. It will also occur when the a/c is regulating itself, I have noticed. Both of which put additional drag on an idling engine.

#3 milnei

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Posted 06 July 2009 - 20:02

I have the same on my TFSi vRS, I guess it's nothing to worry about as it never stalls or misfires when under load........

#4 WaveyDaveyGravy

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Posted 06 July 2009 - 22:07

Me too. Sounds a bit lumpy at times but it's fine when you open the taps.

#5 markticktock

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Posted 07 July 2009 - 10:39

Mine seems to do this constantly, even without a/c on or any other device on, like radio etc.
It will also 'miss' while reving the engine and the car stationary.:confused:
If i rev to about 2000rpm then let my foot off the throttle it seems to give a 'silent backfire' as the revs drop. Does this help anyone diagnose the problem?
And the car has only done 22,000 miles !!

Edited by markticktock, 09 September 2009 - 08:52.


#6 markticktock

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Posted 24 July 2009 - 15:20

Anyone else got any ideas???:confused: Or do all petrol MKII vRS do this?

#7 markticktock

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Posted 13 August 2009 - 07:45

Anybody?????:confused:

#8 rsbspt

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Posted 13 August 2009 - 09:06

Coil pack on the way out?

#9 Krispe

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Posted 13 August 2009 - 10:09

Same for me, has always done it over the last 2 and half years. Slightly lumpy tickover and every now and then feels like it 'misses a beat'. From what I've read I just thought this was an FSI trait, possibly down to the high pressure fuel pump at idle revs (750rpm)? When driving or reved above 1000rpm all smooth.

#10 markticktock

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Posted 13 August 2009 - 15:22

Coil pack on the way out?


Just replaced all 4 coils and spark plugs.:mad:

#11 markticktock

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Posted 13 August 2009 - 15:31

Same for me, has always done it over the last 2 and half years. Slightly lumpy tickover and every now and then feels like it 'misses a beat'. From what I've read I just thought this was an FSI trait, possibly down to the high pressure fuel pump at idle revs (750rpm)? When driving or reved above 1000rpm all smooth.


Mine seems to do this even when i keep the revs at a steady 2000 rpm.
Some times it will be a slight 'miss' about every 5-10 seconds, then another time it will be like every 1/2 a second (bit like 1 cylinder not firing).

I am taking it to another dealer (Capitol Skoda, Newport) on Wed (track rod has play in it) so will ask them to look into it. Will see what happens.

Edited by markticktock, 13 August 2009 - 15:32.
can't spell !!


#12 Taxi 219

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Posted 13 August 2009 - 17:06

Bit early in its life but what about fuel filter?
Hope you sort it soon :thumbup:

#13 clayts

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Posted 08 September 2009 - 19:15

Anyone had /have this?

On idle/tickover the engine seems to 'miss a beat', sometimes quite noticeable through the driver seat. The idle does not 'rev on it's own', just sits at aprox 750rpm. Does it when engine is cold or warmed up.
I took it to local dealer,paid for a diag, but because it does not show any fault codes they don't know either!
Car is under Skoda Approved Warranty, but they won't fork out for diagnostic work to be done to find what is the cause.
So far i have changed the air filter, spark plugs,new PCV, cleaned the MAF and replaced all 4 coil packs.Also run some injector cleaner through it.

Anyone with the same problem? Had it fixed? Any help, as it is driving me mad trying to pin it down.:confused:


Mark.

Accepting that you have a more refined engine than a diesel; at work we have a 2.0 TDi A3 (56 plate), a 2.0 TDi A4 (57 plate) and I have a 2.0 TDi Octavia II (06 plate) and they all have "lumpy" tickover. I have had one occasion when the car was clearly missing on a cylinder. I put it down to a sticky valve as after i stamped on the loud pedal it cleared up.

I like the theory that it could be the load that the aircon might be putting on the altenator. I will have a play with this at some point and let you know.

Mark, found this via Google Skoda 2009 Octavia - First drive: Slicker Octavia RS, Scout up Skoda ante | GoAuto it mentions lumpy idle on the TFS.


"Featuring the same flattish seats as the TDI (which go one up on the RS’s better-shaped buckets by offering power adjustment), the TSI is just as lumpy at idle but soon transforms into a responsive, sweet-spinning engine at revs."


Edited by clayts, 08 September 2009 - 19:36.
more info


#14 markticktock

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Posted 09 September 2009 - 08:51

Well it seems they all do this, some more than others, but unsure why:confused:.

Had a new Golf VI 1.6 petrol as a hire car from the dealer and it too had a slight 'miss', alot less than my car, but then it's not the same engine!

On a side note, i had the N/S track rod replaced by the dealer as it had play in it, now the O/S one has play in it !!! How can this be wear as i have only got 23,000 on the clock:confused:.

#15 Nathanio

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Posted 09 September 2009 - 13:23

Depends on all sort of factors; speed bumps put a lot of pressure on parts like that and cause accelerated wear.

#16 markticktock

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Posted 11 September 2009 - 20:06

Yep, got alot of them speed bumps by me, so could well be the problem.

#17 clayts

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Posted 12 September 2009 - 09:34

Oddly I was talking to someoine last night who has an A3, they claim that cleaning the Throttle Body will solve the lumpy idle. I found an excellent post on this forum http://briskoda.net/...-engine/145866/

#18 s3akr

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Posted 12 September 2009 - 13:00

My '07 VRS is exactly as you lot describe - really quite lumpy on idle about 10 secs after start up. Ticks over at 950rpm but feels like its firing on 3 cylinders! Dealer has looked at it twice and insists there is no fault. I have vag-com and this shows no issues either, but I've yet to check the throttle body - I'll try a re-alignment later today (if the Mrs ever gets back from shopping and takes the kids away for a bit - doing my head in today!!).

#19 Chrispy

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Posted 12 September 2009 - 19:16

You're running it on 97 RON aren't you? Even the diesels are known for a slightly lumpy idle where it seems to 'miss' every now and again. Aside from this though, if it was indeed misfiring on idle etc it would be logged as a fault code and it would tell you which cylinder was doing it etc.

#20 Genoa1893

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Posted 12 September 2009 - 20:36

Hi,
did you change the DIS? Did you try to clean the TB and idle valve?
Finally, I'd give a clean and some silicon grease to MAF sensor on air intake (look for cage mod).

HTH,

#21 markticktock

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Posted 13 September 2009 - 13:40

Hi,
did you change the DIS? Did you try to clean the TB and idle valve?
Finally, I'd give a clean and some silicon grease to MAF sensor on air intake (look for cage mod).

HTH,


Not sure what the DIS is.

Would like to clean out the throtle body but i think i need to have VAG-COM to reset it (which i don't have).:(

Did the cage mod, no difference unfortunatly.:(

#22 markticktock

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Posted 13 September 2009 - 13:42

Oddly I was talking to someoine last night who has an A3, they claim that cleaning the Throttle Body will solve the lumpy idle. I found an excellent post on this forum http://briskoda.net/...-engine/145866/


Ah, looks like this is for the previous model 1.8 20v vRS. Shame 'cos it looked nice and simple.

#23 octavia5

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Posted 13 September 2009 - 17:50

Take a look at the 'Cage Mod revisited' post might just help

#24 Browny_37

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Posted 14 September 2009 - 00:02

I would consider looking at the plugs, when i use to run the Astra Coupe Turbo on vauxhalls standard jobbies it would do this while idling, after around 3000miles of use i would start getting a misfire on boost.

I swapped the plugs out for NGK Iridium plugs and the idle was smooth ever after, with no running issues what so ever.

I think they were a grade cooler running than the standard plugs.

Hope this helps!

#25 Genoa1893

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Posted 14 September 2009 - 07:25

Not sure what the DIS is.

Would like to clean out the throtle body but i think i need to have VAG-COM to reset it (which i don't have).:(

Did the cage mod, no difference unfortunatly.:(


Hi,
as for Distributorless Ignition System, I meant something like this (it's in my dad's petrol Veccy, don't know Skoda/VW part details):

Distributorless Ignition System

Ignition Coils

DIS Coil Pack

If you're not so confident to dismantle the TB, at least you should be able to spray some carb cleaner through it from the air intake.

HTH,

#26 dirk1978

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Posted 17 June 2013 - 18:30

Resurrecting another old thread. My 06 VRS TFSI does this.

The tickover is perfectly smooth from the rev counter and the engine note, but it wobbles. The car like trembles sometimes. Perhaps slightly worse when cold but sometimes does it and sometimes doesn't.

I'd like to think it's not the DMF, but it doesn't have any of the common symptoms anyway.

It may well be the obvious coilpack issue but I've been told it went in for a recall to have them swapped out.

Is this very common? Any suggestions other than the above?

#27 rossm

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Posted 17 June 2013 - 20:22

It could be the Throttle Body Alignment needing done - this would cause it to run less-smooth and might not generate any faults or engine / emissions lights. If you've got VCDS, it's a 2 min job, if not, it may be worth finding someone who has to get it done.

Particularly likely if the battery has ever been disconnected, details here:
http://wiki.ross-tec...Alignment_(TBA)

If it was a regular occurring misfire, you'd get the emissions light on the dash.

#28 dirk1978

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Posted 17 June 2013 - 20:58

Good shout. I've got vag com, got a cable but no windows laptop to run it. It used to work in Linux fine using wine but the ftdi usb-serial drivers keep disconnecting now. I'll give it another go. Cheers.

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#29 SKODA OCTAVIA

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Posted 17 June 2013 - 21:26

same for me has rolld 13 000 km

#30 Stu08

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Posted 17 June 2013 - 21:32

I have the same slight miss on idle occasionally. Appears to be a trait of this car. Passed the emissions test on its MOT last week with flying colours.

Car doesn't miss once above idle. Pulls hard to the redline.




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