So a couple days ago i installed my APR HPFP to finish of my stage 2+ tune and well its awesome.
Anyway i have noticed overtime since owning the car over a year and a half the boost fall from 18-20 psi to the present of 13-15psi max.
Now still new to this motor, but when i changed the fuel pump changed the cam follower, motor sounds happy now and i love it but......
The boost thing is still concerning so i did a couple quick pulls and at 4-5 k rpms there is a small hiccup or quick stop through all the gears. It goes away after and only occurs at WOT. Any idea people?