Oil Overfilled. New misfire

[s3_matt_c]

2009 S3 Quattro 102k miles
Recently discovered my engine oil had been overfilled by approx 1L. After driving like this for some time, EML came on and EPC light flashed. Developed misfire in cylinder 2.
EPC light does not come on anymore.
Does anyone know what's common to go on these engines when overfilled by this much?

Battery, coils and plugs are good.

Compression is good - around 190psi on problem cylinder. All other cylinders are 180-195psi region.

I haven't had time to check injectors - and I will check them - but as they aren't affected by oil I don't see what could go wrong there.

My suspect is inlet valves / passageways being all gunked up.... What do you think

Thanks

[Crasher]

Yes my suspicion would be intake valve carbon.