so i have replaced the diverter valves and the N75, it deffinetly made it better, but i am still losing power at 4k and then start to get it back at 5k. i have checked for boost leaks and dont think its the issue, should i just go to audi and say "tell me whats wrong"? because im out of idead

 

Just throwing parts at it will not fix the problems.

You need to do some Vag-com logs & find out if you are getting boost cut, or seeing what the ECU is asking for.

 

i understand tha i need to see what the ecu is saying but how should i do that, is there a program for a computer that hooks up to the ecu do i go to audi or are there other options, i very new to audi's.

 

VAG-COM
http://www.ross-tech.com/

 

what VAG-COM would be the best to get like what model