In 3rd gear when i hit 6k i watch my boost go from 10psi to 0 and the car just turns into a slug. It only does it in 3rd gear though. I tried searching but to little avail cause they all seemed like diff. problems And it only does it some times.....Tried looking but couldn't see any vacumhoses popped off.

 

First culprit to check would be the check valve line between the y-pipe and the pressure chamber.

 

Rynberg you have a knack for coming to my rescue once again lol. I'll check it in the morning i have to go to work.....Starbucks yay!!!!1One!1

 

had a similar problem ... my 2nd turbo wasnt working on 1st gear only, it was a unplugged hose near the UIM....

rynberg is tha man


Max

 

Ok i can't seem to find the problem and to make it worse and to make me hate life.....i just got my but handed to me by a stock rx8 (was reeling him in w/0psi at 140mph) I'm so mad right now....ok i think i'm gonna take the easy way out i've tried to find the problem and just go non-sequential....until i can save up for the single. Anyone near Evansville, IN (southern tip of INdiana) that would be down for a trouble shooting/NS conversion day in a heated shop with all the tools needed and welding/machine shop at their disposal?

Oh yeah..it loses boost in every gear after it reaches 10psi.

 

Replace both of the green/black check valves. If you're in a pinch, take the two big green/black ones and switch them with the green/white ones to test. (But replace the ones that aren't working)

Dave

 

SinglE!!! SINGLE!!!!SINGLE!!!!! time for one turbo dude..j/k these guys definetly have you on the right track, btw, did you check the silicone hose that connest to the Y pipe, if that is burst/sliced, at seriously high pressures you'll have that problem too.

 

Here are the hoses to check (I greyed out the ones that aren't involved with the turbos)

http://www.davidgeesaman.com/rx7/93v...sequential.jpg