Hello guys.A week ago i purchased a 2008.5 speed 3 with some mods.Before buying it i went for a test drive and it held 18 psi without any issues,did some more driving all went fine so i took her home.It sat on my garage for a few days and i did fixed the one exhaust leak it had.Today i go 2 drive it and it did fine for a minute,it did boosted fine but then when i got 2 the one intersection it did sputter on me a little,like a missfire and it lost power.I did give her some more gas but she wouldnt go at all it feels like i am hitting a wall.The second that it sees any load at around 3500rpms it will act like is hitting a rev limiter and it builds maybe 5 psi of boost.Another issue is that if i rev the motor in neutral it wont go past 3000rpms.The car has a full 3 inch exhaust/new oem turbo/coob boost selenoid/intake/front mount intercooler/fuel pump internals and egr valve egr kit and i do have a CEL for that.Person i bought it off have no history on it cause it came from a auction.Can you guys point me on the right direction please?Thanks.