well, ive had this boost problem for a while, and I hve finally had time to fix it. Im 17, so I do have other things that are more important, like studies and such ya know? well it started off, when I got my Defi boost gauge and installed it, I got 10 5-5 so basically, I only got 5 pounds after 4500 rpms. so, after checking some things out, replacing all the vacuum lines under the intake tubes, the 4 on the wastegate control, and the other selenoid right behind the vacuum tank, and the vaccum tank lines, I even looked pretty well under the manifold, and didnt see any popped off. I went under the car to switch it to non-seq temporarily and forgot that I was a retard and didnt check the TCA clip,and of course, it was popped off, so I popped it back on, and I thought yay! I can get full boost again! so I was running the car, and now when I hit secondary if I am flooring it, all my boost leaks out to about 1 pound. but if I keep the throttle to a minimum of having 5-6 psi through 4500 rpms, the boost sticks, and nothing leaks out. when it does I get this huge WOOOOOOOOOOSH!!!. so, I pulled off the couplers on the y-pipe, checked the y-pipe itself, and the hose coming off the intake manifold and its rubber tube. not the one on the lower intercooler though. I know there are a billion boost posts, but I would appreciate some direct answers ya know? thanks alot to anyone who attempts at helping me out
Stevo!

 

also if I let off above secondary, and stomp on it,I still hear the big WOOOOSH and get 1 or 0 pounds of boost

 

check your BOV, one of them might be leaking

 

If you still have stock rubber vacuum hoses, its time for silocone hoses and the dreaded vacuum hose job.

 

Go to this thread and read how to find boost leaks. https://www.rx7club.com/forum/showth...boost+problems

 

Did you fix it? I'm having the same problem after a hose job.

 

yeah I fixed it, did the vacuum line job, replaced the CC solenoid, flipped a check valve around, replaced one and I got my good boost back

Steve