where. I pumped some cigarette smoke in but it just came out all in the back. I sprayed windex around the area and nothing but I can hear it very loudly. Everything I blow in leaks out in about 5 sec. Anyone know what's back there that might cause a boost leak? Also, it seems like I might have to pull the plenum to get to it, if I can I still pressurize the system somehow with the plenum off?