Boost/Hesitation issue...

[1.8G]

Ive recently started to drive my a4 again, it has been a while because i have been away the last 3+ months. When i got back, i had to replace the battery, but after that it was running alright, with the exception of the following: My boost gauge shows that my turbo is spooling up at the normal rate (GTRS @~3350), but i dont get any real power until about 5k, when it comes on really fast and sudden... Is this a boost leak, a bad dv? I have never felt this before, very odd.

[Jkilla71]

I had a boost leak in the 90-elbow before the suction pump but the characteristics were the exact opposite. I would have boost until I hit the gas hard.

How about the wastegate sticking??

[1.8G]

Im not overboosting or anything though, just holding a solid 19psi from 3.5k up, but its not until 5k that i see power.

[Jkilla71]

Just brainstorming but could it be the N75 valve causing the ECU to act crazy. If it were that I think would you would get CEL