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

[Martin]

Mum's MK2 118TSI (1.8T) Elegance is very lumpy when starting up, it makes the whole car shimmy slightly while warming up. Would that be the carbon intake issue? Whats the going price for it?

It has 90K on the clock

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

[Martin]

how hard is it to do an intake manifold clean?

mine stutters to a stall once in a blue moon when coming to a complete stop in heavy start stop traffic.

sounds like have carbon build up too.
about to hit 95k.

That sounds like something different

It's a real pain cleaning the inlet (with some risk)
Best to a workshop with things like a walnut blaster and associated tools

[Martin]

I've always wondered whether it's fuel related or potentially our driving. We only do short km's up here in Darwin and mostly under 100km/h. The car has always had 98 except for the trip from Brisbane to Darwin.

It's because the engine is direct injection into the cylinder
Normal fuel injection is into the inlet - the fuel washes the inlet clean

[zei20t]

It's because the engine is direct injection into the cylinder
Normal fuel injection is into the inlet - the fuel washes the inlet clean

^^^^ This

also, the PCV valve passes plenty of oil to coat the intake piping and throttle body

[gamcem]

Thanks for the info!

[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.