i have a 2000 a4 1.8t i purchased about 2 moths ago. around newyears i got the car the chipped the stock dv was leaking so i never saw peak boost. last week i installed an apr r1 dv. and car was running 18psi well for a bit till a coil went. i got just the one coil that was gone. car seemed to run fine but with more driving there was still some missfires over 15psi. today i went and got the 3 other coils and it still s chiped eems to missfire when it get up near peak boost. also it goes into limp mode if i pin it between 2500-3500 where it has the most boost any ideas ??? thanks in advance Matt

 

Do you have a CEL on? i had a bad maf sensor which kept throwing my car into limp mode if you CEL is on scan the codes and post them i'll try to help you