I just purchased a 1993 RX7. I was reading on some sites and it said that boost should be 12 psi on primary turbo and 10 psi on secondary. I am getting 5 pso, then jumps to 10 when the second turbo kicks in, and at times the secondary wont kick in. The car was sitting for a while I believe and I am not sure how often it was started. Tha car is all stock.....so I am trying to figure out if I have a bad solenoid or vacuum leak or what. any help is appreciated!

frank