Hi... I have a 2006 2.0t fsi octavia petrol... when accelerating or cruising around the 2000 to 3500 revs the car seems to stuuters but no engine light comes on, i have taken it to the garage and somebody claims it could be a coil but then the engine light should come on... Then somebody else says its the petrol filter ? The car hasd been re-mapped could it be the map was done wrong ??? help please before i spend loads??? :wonder:

Can you replicate it easy enough? If so they should be able to quickly nail what's wrong reading live data off the car.

It could be either of the suggestions i suppose but fuel filters tend to show up at the top of the rev range, rather than only in the middle. Coil would seem more likely of the 2. There's other things it could be too, fuel pump, fuel pressure regulator, in fact there's loads of things when you think about it. Any other symptoms to help narrow it down a bit?

Did it do it before you had it remapped?

Fuel delivery problems tend to show up at high engine speeds when fuel demand is greatest.

Ignition faults tend to show up at part-throttle under load. If its a coil then when the fault occurs, gently easing down on the pedal would make it worse.

I have just attended to another car with similar symptoms - that was the plugs - they looked perfect, but a new set cured it.

Be aware that even if the MIL doesn't illuminate, there is still the possibility of a stored fault code. Get the car interrogated with a scanner.

Mine's doing the same, but I've only had a handful of stutters so far and each has only lasted half a second - I've got a new coil pack in the glove box now but I'm not convinced that's the problem. Been 3 weeks now without a stutter though so might have been the cold temps causing havoc somewhere.

Aye mine does it in the cold weather months but only when the engine is cold, I find running Vpower helps a lot.

I logged the misfires with VCDS and they disapear when it's warm.