Missfire on boost

[Majorcina]

Today was a bit strange day,i was in hurry to a meeting for a new job,and i was afreid that i will be late so i was driving a bit faster,and when i pulled from the traffic lights i had a missfire in second while boosting(didnt hammer it in first,it missfired when i floor it in second on almost full boost),and i toth maybe the batery wasnt tight good(i removed her today so toth thats the problem)then i restarted the car for evry case,couple of minutes later missfire again on boost in 3rd,after that i didnt drive above 2000rpm.
After i come back home i tighten the batery again and went for a test drive,40min+ of driving no problem,almost all time boosting 1-2-3,and when i decided to go home i get missfire in 4th on half the throtle(car was in boost),also for 1 second check engine light come up.
After that i pulled the codes via blink system,and the only fault i get is
2111,G28 sensor(i know its normal to get it when the car is off,so i eliminated it)
Any idea what could be the problem

[UrS4boy]

One missing and hesitation diagnostic

Coils, Plugs, POSs, MAF. Take your pick.

Start by reading this:

http://forums.quattroworld.com/s4s6/msgs/22611.phtml

[Costash]

Old coil pack failure ...

[Majorcina]

I am on phone so i will read it detailed when i come home.
But,got upgradet tfsi coils,new ngk spark plugs with less then 1500km on them,also POS have been deleted when harnes for coils has been made.

[Costash]

Possible a bad connection ignition related.

[hunker7]

Still, could be coils or spark plugs. Oh wait, you say they are NGK, check the gaps, geneandbolly on here had the same issue and he re-gapped them and it was all running fine.

if i remember rightly the ngk plugs are gapped at 0.75mm out of the box. they should be 0.6mm for the aan engine.

i can't believe that 0.15mm can make such a difference (said the nun to the bishop).

[Majorcina]

Will check it out Janis