APR 1+ misfiring

[tketke]

I have a few codes and a large problem. My 03 1.8t a4 was running fine, then a little while ago I had a quick misfire and an check engine light, which went away. Then it came back much worse. Now every time start to hit anything above 8 or 9 psi boost my engine starts misfiring like crazy. I am running apr 1+ software. Now here are the issues I havent put on an exhaust yet, which the tuner said would be ok. I am also using siemens 380cc injectors which eurocode said were compatible. My codes are...

18062.P1654 dtc memory of instrument cluster
17536.P1128 bank 1 mixture adaption - system too lean
17522.p1114 bank 1 sensor 2 internal resistance too large

These are besides the misfire codes. I already sent an email about the injectors. But do need a new MAF, a new rear o2 sensor, an exhaust or all of them??

[dextrek]

I was told by the apr guys not to use siemens 380cc injectors as it creates problems like running too lean. I think APR+ program recommends either TT 386cc or the APR injectors only.