I'm having an issue that I haven't seen any postings on anywhere. My boost is reading 13-14 psi, but the acceleration is very flat. Also, the boost guage has a lot of flutter in first and second gear. It seems to be bouncing anywhere between 8-15 psi. I purchased the car about 2 months ago, and the acceleration was much higher than now. The engine seems to be much louder as well at high rpm's. Any ideas?

 

check for boost leaks.And you're saying the car won't go as fast as before but the rpms run high? if so you're clutch might be slipping