Went racing and be a nice supra. Only problem is I boosted high enough were i think a hose blew off. Time to take off the intake. When I drive, I slow start to build boost, but efore it actually gets to 1 psi, a sound like a pressure cooker start coming out. Damn hoses

 

if it's only building to 1psi max, i would suggest that it is a fairly large hose, not a simple vacum line. mine did a similar thing and it was the hose on the elbow right before the throttle body, also check any of the large tubing between the turbos and the throttle body. do you have an efini Y-pipe?

 

That is goinb to be an intercooler hose. Either popped off or split open. I was getting 3 lbs of boost, and found the hose going into the intercooler had a 3 inch split in it.

 

Check the turbo couples, they are the rubber pieces which connects the crossover tube to the turbos and the intercooler. They are usually cracked. Maybe you want to check the lower intercooler piping also, usually those become loose. Also check the aluminium piping that goes from the 2nd turbo up, mine came loose one day and boost was leaking.