Acceleration Hesitation

[jerry666]

Hi, I have a manual 2010 TSi 118 (no mods done). It has done 70K. At 60k had to have the rings replaced after I lost a cylinder. Since then the car has been running fine until the other week. I noticed a slight hesitation when accelerating while in top gear. Didn't think much of it until it started happening more frequently & it is now happening in all gears quite frequently. At times it repeatedly hesitates & I can feel the car surging trying to accelerate. If i am in the lower gears just cruising around I don't feel it until I put the foot down, then it will hesitate. Sometimes only once, sometimes multiple times. I plan on booking it in for a checkup as it is still under an extended warranty. I just wanted some advice on possible causes as I want to give the repairer an accurate fault description. Any advice greatly appreciated.

[vdubmotorworx]

Are you using 98 RON fuel??

[The One]

And if so, what company are you using to fill up with?

[jerry666]

Yeah good point. I mix it up, sometimes 98 sometimes 95. Always have, never had a problem until now. I usually use Woolworths Caltex as there are more of them in my area. They are all on the same stretch of road. Will have to try some 98 from a different company. What are the changes of bad fuel causing this?

[ziggyboy]

Do you have warranty?

The 118TSI is a very expensive engine. AFAIK VW never actually fixes them, they always replace them.

[buzuki]

Could be a supercharger clutch issue?

[jerry666]

Do you have warranty?

The 118TSI is a very expensive engine. AFAIK VW never actually fixes them, they always replace them.

I have an extended warranty.

[ziggyboy]

Just take it in and get it resolved ASAP.

[The One]

Do you have warranty?

The 118TSI is a very expensive engine. AFAIK VW never actually fixes them, they always replace them.

You are mistaken, VW replace injectors, pistons, piston rings and software update.

To OP: Always use 98RON, especially for a CAVD as Australian fuel quality is extremely poor. CAVD in Europe is known to be a 'bullet proof engine' due to fuel quality there compared to ours. FYI

[mr gee]

spark plugs?

[jerry666]

Thanks for the replies. I think in the meantime I will run a few tanks of 98 BP ultimate through it. If it keeps happening I will take it too the dealer. I just have no confidence in them. They led me up the garden path with my piston issue when they knew all along what was wrong.

[brad]

Shouldn't run them on anything less than 98ron.

[ziggyboy]

To OP: Always use 98RON, especially for a CAVD as Australian fuel quality is extremely poor. CAVD in Europe is known to be a 'bullet proof engine' due to fuel quality there compared to ours. FYI

Then doesn't this suggest that it is not bullet proof? It proves that it is only OK with good quality fuel. Wouldn't a bullet proof engine be able to take bad and good fuel?

[jerry666]

Update, just filled up with V Power 98. Driving home, gave it a bit in 3rd started lunging then the engine light started flashing then went out. I am thinking this maybe related to the rings problem. Would a loss in cylinder pressure cause the problems I am having???? I am not convinced there was no damage to the bore when I lost a piston at 60K. I looked at the shop repair log when the service guy went looking for my key, a technician had written he could feel a scratch in one of the bores with his finger nail. But VW decided this was not significant enough damage to replace the engine. Looks like I am calling VW Aust. tomorrow.

[The One]

Then doesn't this suggest that it is not bullet proof? It proves that it is only OK with good quality fuel. Wouldn't a bullet proof engine be able to take bad and good fuel?

So let's just run E10 into everything and see how it goes then?