3rd gen boost problem
 

just wondering if any one has seen this before, I've got a 3rd gen with the stock sequential setup with the pettit ecu and the greddy profec b spec 2 and I'm getting a really slow spool/response in the low end, it barely hits 10psi up to about 4k rpm and after that it jumps to the set 15psi and hauls ass. I've gone over my settings on the profec and its the same as it was before the problem, it has 18" of vacuum at idle so I don't think I have a leak. I appreciate any ideas or suggestions, thanks.