Can somebody tell me where to start checking for the leak??? my pfc commander shows that im only boosting .42 but im set for .80 ..

 

If you haven't done your vacuum hoses to silicone yet then you should have. If you haven't and you bought a pfc already you should be ashamed of yourself.
Check the couplings and the y pipe. If it's not there then most lkely it's time for you to do a vacum hose replacement job..

 

also check the intercooler hoses especially the lower hose. mine had a 2 inch slice i could only see when i took it out

 

Well any update on your leak??