Stuttery / Jerky engine at 1100-1400rpm when cold!!?? Help!

[donweather]

Those are the symptoms - can happen as early as 80k but common around 90k~100k
Can cost $350~$500 to get it cleaned up

My Tiggy cost way more than that unfortunately.

[Tigger]

Does anyone know a place in Sydney (perhaps south) that would be good at sorting this issue out?

[woofy]

Which engines are direct injection? I have a brand spanking new petrol RS, but just sold my 2008 TFSI to my parents so will hear about it, if it ends up getting choked up. It's at 72k at the moment.

[readerr0r]

Which engines are direct injection? I have a brand spanking new petrol RS, but just sold my 2008 TFSI to my parents so will hear about it, if it ends up getting choked up. It's at 72k at the moment.

You just said it FSI is the name VAG uses for direct injection. The smaller engines are less problematic than the 2.0t it seems

[planehazza]

Hi all,

Just registered quickly so I could chime in a bit with the intake manifold vane/valve cleaning. It's a bit of a pig of a job, but I managed with only the essentials and very little experience. I did do A LOT of homework first so thankfully most of it was familiar to me as I went through the task. I did underestimate the effort needed, so in the end it took me 3 days to get it all out, cleaned and it all reassembled. I need to reiterate though - from an automotive technician's perspective, I am a total novice, so it take stronger DIY'ers less time.

Here's my after action hints and tips thread, over at Briskoda:

Replacing Intake Manifold and Removing Carbon Buildup - 2.0TSI - Skoda Octavia Technical Guides - BRISKODA

My car was at 69k miles when I did it, and well, let the before and after images of the valves speak for themselves...

I was quoted £600 best case to have it done professionally. I sourced the intake from the US (£130 posted with Tax, as opposed to £330 buying here in the UK directly) and did it myself. Cost me about £250 in total once I bought injector seal kits, carbcleaner, canned air, random tools I didn't have etc.

[Reedy]

I had the same. VW claimed it was the HPFP over fuelling when cold. I changed it along with the cam follower and MAF. Is is perfect again. Not sure which part did the trick. Cam follower was fairly worn. Fuel consumption came down straight away with the new MAF.


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[planehazza]

I had the same. VW claimed it was the HPFP over fuelling when cold. I changed it along with the cam follower and MAF. Is is perfect again. Not sure which part did the trick. Cam follower was fairly worn. Fuel consumption came down straight away with the new MAF.


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I'd like to just add to this that the HPFP follower only has wear issues on the TFSI engine, as the TSI uses a roller rather than a flat plate.

What would cause a MAF to fail or wear out?

[Reedy]

Even though it has the roller type inside of it was flattened down compared to the new one, the roller part was fine, it was just where the HPFP sat inside, it looked warn flat. The new one I put in was a different design again, perhaps there has been a part number change since 2010 to now. It was still the roller type but different.

Age is what might cause the MAF to fail. These fail gradually over time.


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[planehazza]

Even though it has the roller type inside of it was flattened down compared to the new one, the roller part was fine, it was just where the HPFP sat inside, it looked warn flat. The new one I put in was a different design again, perhaps there has been a part number change since 2010 to now. It was still the roller type but different.

Age is what might cause the MAF to fail. These fail gradually over time.


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Ah I see. It might be worth me investigating the follower in mine - I hadn't realised the TSI follower could fail.

My idle shuddering seems to be linked somehow to the climate system. I can feel it changing or even stopping as I turn the AC on or off etc.

[woofy]

The radiator fans spin faster when the A/C is on I'd say a few things behave differently when it's on.

[planehazza]

Ah I see. It might be worth me investigating the follower in mine - I hadn't realised the TSI follower could fail.

My idle shuddering seems to be linked somehow to the climate system. I can feel it changing or even stopping as I turn the AC on or off etc.

The radiator fans spin faster when the A/C is on I'd say a few things behave differently when it's on.

Yeah makes sense. Well I think I can scratch what I said, as I was playing around with it in traffic the other day and I there are times when no matter what I turn on or off, the shuddering does not go away. I've got my car going in this weekend to have the sum pan replaced (after some monkey severely over tightened the bolt) so I'll ask them to take a quick look...

[Tigger]

Just thinking...Could it be the DSG playing up??

I have now done everything as suggested above, plus more....
The issue still persists....

I am wondering if it is DSG related instead?

[Martin]

Won't be the DSG
Have the injectors been cleaned out?

[SkodaYeti]

Same sort of issue on my MY15 1.4tsi Yeti, Just let it warm up for 30sec (or until it stops sort of sounding like a boat engine) then its fine...