wierd boost issues please help!!
 

I have been having this problem since I bought the car a year ago, and I can not figure out what is wrong. Okay heres what it does. I will be in gear going WOT and it will boost just fine and both the turbos kick in just fine all the way to redline. Then when i shift and get back to WOT i get no boost at all and also it makes this wierd kind of rattling noise its very quiet though, and if I stay on it through this rattling noise it will start to bog hard at 6,000 rpm's like it has a fuel cut or something. I have replaced the boost control actuator and I just did a complete vaccum job and its still doing exactly the same thing. Please any help or ideas would be greatly appreciated. Thank you.

anyone have any ideas i have searched.

Before you change those turbo control solenoids, (which are a likely candidate) change your check valves. Just the one leading to the pressure chamber and the one leading to the vacuum chamber.

Dave