Yeti juddering after cam belt change

[helix]

Hi, I recently had my Yeti 1.2tsi DSG serviced and the cam belt changed, as advised at 5 years. Since, the car sometimes judders at low revs, as if about to stall. A factor seems to be that the car is in too high a gear, ie changes up too soon and holds it for longer (e.g. 4th at 20mph). I’ve sometimes addressed this by moving into manual and dropping a gear. I’ve had a situation where I couldn’t get acceleration, I suspect because the revs were held too low for the turbo to engage. Put simply it’s as if the ‘intuitive’ link between the engine and transmission is less effective. I also occasionally notice the engine miss a beat at idle. Prior to the service the drive was very smooth, and DSG gear changes almost always imperceptible and appropriate.

The garage is aware, and I’m taking it back to give them a chance to fix it, but I’d value people’s suggestions for possible causes and solutions so I’m prepared. Please note my mechanical knowledge is slight! Thanks very much.

[Ootohere]

@helix

 

How many miles has your Yeti done and when were the Spark Plugs changed, or even inspected?

 

Are you aware there is a Service Campaign on some DQ200's from 2013-2015?

This was started in 2017 and is a Software Update. '34H5'.

 

It did not appear on the VIN checker until last year after yet another Recall was started in Australia.

 

Check with the Dealership to see if your car / DSG should be part of the Service Campaign / Recall action.

http://skoda-auto.com/services/recall-actions

 

Edited 25 October, 2020 by e-Roottoot

[helix]

Thanks very much for your advice- I don’t think I am aware of this; my Yeti is late 2015 production so could be in scope. 

[helix]

Thanks again; the car is low mileage.  I’d considered spark plugs too as a possible factor given the symptoms and I’ll certainly ask for these to be checked

[Ootohere]

There were due replacement if never done.

?

Have the brakes ever had any servicing, or the brake fluid changed?

 

Edited 26 October, 2020 by e-Roottoot

[helix]

All done as per schedule. I’m taking it in tomorrow so we’ll see

[Austin 7]

Hi Helix

 

I know this is an old thread, but did you resolve the issue ?  It looked to me as though 1.) your car was OK, 2.) the garage worked on it, and then 3.) it wasn't OK.  Conclusion, they must have done something !

 

If the cambelt is fitted one tooth out, it will run poorly but the software may just be able to maintain the correct idle speed and mask the issue to some extent. One tooth error either way probably isn't quite enough to incur any valve versus piston damage.

 

I once had a Polo which had the cambelt changed by an independent VW specialist near Totton in Southampton.  It ran like a dog afterwards, but they were adamant they had done it correctly, even going as far as to say that the notch marking on the lower pulley (which didn't line up with the fixed mark) "must have been put on wrong in the factory".  Four years later I replaced the belt myself, and the car was transformed back into a lively youngster.  By then the franchise had gone bust.  Yep, despite the bluster they had indeed got it one tooth out.