The great big MK6 Golf 118TSI tuning thread

[ope126]

I deliberately let mine warm up for a good few minutes in the mornings. It takes 30-40 seconds for the revs to settle while it runs like dogsh$t. Was it that soon after startup or had it settled? There's no way i'd be getting it up to 4000 or more straight away. I've heard it's also wise to let the supercharger oil (sealed permanently) warm up before you give it some curry.

Did you already do your coil packs? If not maybe do them at the same time as the spark plugs. When you pull your plugs take the opportunity to have a look at each one and note the colour (ie white = lean burning cylinder). Curious to see if there's variation across the cylinders.

If you replace the n249 might as well do the n75 as well. My mechanic did my n75 and told me his supplier at VW said to do both and i laughed it off as an up sell. Sure enough, my n249 shat itself shortly after. If you replace those make sure you get the latest versions as they were updated. As mentioned previously, I noticed a solid recovery in performance after i changed those valves, although mine were so far gone i was losing boost at higher altitude (like 1,000m).

Around how much are these valves (n249 & n75) from VW Parts?

[The_Hawk]

I had the same splutter again yesterday, although I haven't had a chance to run the scanner over it I assume it will say the same thing. Same deal, cold engine, pulling out in busy traffic round the corner from home and hit 4,000rpm in second left me with a splutter and a flashing engine light. Everything still running smoothly otherwise, even with the light flashing. Pulling over and turning it off and on again clears the light and everything works as expected.

I wonder if a DSG equipped car would hit these revs more often vs a manual as the DSG tends to use more of the rev range (in my experience anyway).

In any case, it's due it's first major service (with 27k on the clock ) and is booked in for Wednesday so we will see what happens then.

[Rawcpoppa]

I'll bet it's your coilpacks.

[The_Hawk]

Would a coil pack only play up when the engine is cold and work perfectly the rest of the time though?

I'll bet it's your coilpacks.

If it is, the R8 ones with adaptors sound tempting for a better spark. Who knows which plugs are in there, but they have never been changed either.

[rygreen93]

That's weird because my brother has a 2009 model and it does exactly what you are all explaining. It sounds terrible on start up and about 30 seconds later it's all good. I have a 2012 model and mine never ever does that. I hear the supercharger warming up with a distinct siren like sounds and after 30 seconds that stops. I assume this is something they stopped doing as the engine grew older.

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[redhot]

That's weird because my brother has a 2009 model and it does exactly what you are all explaining. It sounds terrible on start up and about 30 seconds later it's all good. I have a 2012 model and mine never ever does that. I hear the supercharger warming up with a distinct siren like sounds and after 30 seconds that stops. I assume this is something they stopped doing as the engine grew older.

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Quizzed local dealer service manager re '09 118TSI rough idle on cold start; Answer........don't worry about it!

[Mk R]

Ha! Of course they said that. I've been paying closer attention to the ambient temps after Blowers info that it only gets the start up rough cough between 20-30 degrees C. Started it up today showing 18.5 on the dash and sure enough it started smooth!

[Rawcpoppa]

Would a coil pack only play up when the engine is cold and work perfectly the rest of the time though?



If it is, the R8 ones with adaptors sound tempting for a better spark. Who knows which plugs are in there, but they have never been changed either.

My stock ones would cause misfires inconsistently in 4th gear while accelerating around 4000 rpm. If pressed it would deactivate a cylinder too. I've seen others post their ignition coil stories and the symptoms vary in terms of what gear and engine temp. Reason why I think yours are going is because ignition coils have been known to have issues under VW group and there are revised ignition coils for our engines depending on when your car was made.

Your car was made in what year?

[The_Hawk]

Mine is one of the first in the country, brought in for the launch of the Cabriolet

Delivered in oct/nov 2011, from memory the build is 08/11 so ti should have all the new bits.


I went for a squirt yesterday after it was all warmed up and it's not missing a beat, just those few little stumbles on a dead cold engine.

So rich fuelling on startup, cold engine, old plugs... Sill see on Wednesday what the experts say.

[rygreen93]

Hey guys.

I have some completely fkd news. My car started running rough earlier this week and progressively then started barely running. I had it towed to a mechanic. 4th cylinder was down to about 75 psi of compression AKA. Nobody was home.

They basically told me straight up that it is gone. Most likely around $7k for a rebuild using all the revised engine parts.

I contacted VW and they have told me to have it assessed by a VW garage as they may cover the repair costs on goodwill that it is only 1 year out of warranty.

I will have to get everything stock back in the engine and have my stock tune put back on before getting it assessed by them.

Such a fkn terrible week and after doing so much research on these engines I was so confident that being the 2012 model it would be fine.

Anyone have any other advise or solutions I would be happy to listen.



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