I have no idea where this leak is. It sounds like its coming from inside the car on the driver side, but i cant find any vacum lines in the car. This is why im a FC guy not a FD guy. i checked the line to the pressure sensor and it seems ok. The leak happens during peak boost levels only. ive got the vacum diagrams and the only thing i see close to where im hearing it is the pressure sensor.

 

Why does it have to be a vacumm line? Can be an IC or connecting hose, or even a gasket .

Have you checked them?

 

I would suggest taking a look at the following site:

http://www.autosportracetech.com/RX-...leshooting.htm

It will step you through troubleshooting boost related problems.

 

dayem, I also have a leak coming from the driver side too, but couldn't find anything that will lead to that hissing noise... Let me know if you found your leak..

 

well im begining to think that it might be the brake booster. thats the only thing i can come up with. if anyone has anymore sugestions im open to ideas.

 

That's what I was thinking too, but could the brake booster cause boost problem?? I know I'm getting boost, but it's so laggy and not as fast I thought... well keep me update, I'm out of ideas

thanks