boosted3g

I was on our dyno yesterday with my Ls and were running repeated attempts to correct my severly overly rich condition. I was running 16 psi for several runs leaning it out every time. I must have made at least 6 pulls with the same 16 psi but then with no adjustments made on the profec or the wastegate the boost became really lagged and topped out at around 7 psi at 8400. I checked all the lines and connections and nothing has been disconnected. Any idea what happened or any way to correct the problem. I dont have another profec in stock to just throw in and try to compare if its the unit itself. I would like to play around on the dyno again today but i need to et this corrected obvoiusly.

BTW the LS made 345 whp @ 16 psi with a 9:1 a/f ratio, yeah its really rich also i havent touched the cam timing yet on my 404s