A3 3.2 Misfire when Warm

[daniel1920]

Hello, looking for some help for a misfire I have, When the engine is cold its running smooth with no misfire. Once its heated up a bit (about 5 or 10 minutes) it will start to misfire from idle to ~2500rpm. CEL is lit.
I have ran the fault codes and have:
--Misfire on cylinder 3 & 4
--Lamda sensor B2; S1 signal too high
--Linear lambda sensor B2 S1 pump current
--Bank 2 system too rich off idle.
Last night I cleaned the MAF and reset the ECU by disconnecting the battery, ran smooth as a whistle with the CEL off for about 10 minutes until the misfire started again.
Soooo, Any ideas which can help me out will be appreciated, garage is the last resort!

[Dr G]

Any oil in the plug wells?

[daniel1920]

Not that I've seen, In GG aswel and getting pointed towards the coils now

[cuprabob]

I would say coilpacks too.

Were the coilpacks replaced by Audi under the coikpack upgrade issued in February 2011, reference "28F5"?

If not give your local Audi dealer and you might get a new set of coilpacks.

[daniel1920]

cuprabob said:

I would say coilpacks too.

Were the coilpacks replaced by Audi under the coikpack upgrade issued in February 2011, reference "28F5"?

If not give your local Audi dealer and you might get a new set of coilpacks.

I found out about this upgrade this afternoon, but unfortunaly the previous owner beat me to it, was so optimistic I was getting a set of 6 for free!
I'll swap them around tonight and see if the misfire changes cylinder