Hi
I was recently at the track when I noticed low boost 4-7psi. The second turbo
would not activate?? I looked under the pressure chamber?(near manifold)
and found that there was a small spray of oil. The vacuum check valve had come undone? I connected it but still the boost problem persisted?? Must be a faulty
check valve?? Today when I went to pull the part and take it to get a new one
I noticed the second hose on the pressure box was not connected to anything??
It looked like it was caped. Any reason for this?? Thanks
John

 

The one without the check valve goes to the Rats Nest. Is this the one that is capped? Are you non sequential? Any pics?

 

I will try to get pics. I am still sequential. I think that hose
is vented to atmospher. The other hose goes to the faulty check valve.
John

 

Make sure the vented hose is attached to the rats nest as in the diagram.

 

if you look at the diagram it is the pink hose from the pressure chamber. What does it connect too?? I have fixed the check valve but I am not sure if I should attach the other?
John

 

The line with the check valve attaches to the Y pipe. The other line from the pressure chamber attaches to a pipe in the rat's nest toward the front. If you have a manual trans, there should be 2 open pipes at the front of the nest. The one pointed toward the pressure chamber is the one you want. Quick check is to take a short drive, shut down and pull either hose off the chamber and listen for the hisss..

 

Thanks
I just drove the car and still only 4 psi??I just saw your post so I did not connect the second hose. I should connect it to the open pipe closest to the chamber? I think it has to be that one as it looks like a stretch to get it to the other. Why is there two open pipes? I guess there should only be one?
Thanks for the help!!