well im running 20psi on my 94 bpu++ Supra.....every time i drive around boost goes to 10psi and sits at 10psi until it jumps to 15psi at 4000rpm(2nd turbo). I can never hit 20psi in the streets or in 1st, 2nd, or 3rd gear. Now when im on the highway it goes to 20psi with ease in 4th, 5th, and 6th. ??????????? someone please help!!!