HELP: RPM hesitations

I own a 2002 turboed accord(f23a1). I run around with 5-6 psi boost only. It has developed this crazy hesitaion around 4,000 rpm. Sometimes its violent and sometimes its a small hic-up. When i rev the motor, the rpm guage freezes and jumps around only at 3,000 rpm and greater. It seams that the needle will just freeze and then cetch back up with itself, only after 3,000 rpm though. I have changed everything with the ignition system except for the ignition module. Please help me with this stress thats eating me alive.