Hi everyone,

I have tried searching but to no avail so I'm really hoping someone can shed some light on this for me.

All day yesterday my car was driving fine and all was good, nothing out of the ordinary. Last night I had to head out and decided to give it some love and noticed that after 2500rpm it struggles to rev. Very similar to misfiring but not near as bad.

The car is still able to pick up speed but not near as fast as it usually would. I tried it in 3rd and 4th. Yet to try it in the first two gears just incase.

A few things to note;

1. It has a Wank Off Valve.
2. Diff-Back Exhaust.
3. Due for service 1000kms ago.

I'm thinking it could be spark plugs or even coilpacks but would like some more advice on this as it's really shitting me. And car will be serviced eiher end of this week/early next.

Car is an '06 STI.

Any help would be greatly appreciated, thanks.

Andrew.