first vett

I just changed my blow off valve do to the old one not opening.Now I am getting vapors out of both valve covers and the dipstick tube.I also noticed oil around the coupler on the boost side of the supercharger.I did a compression and leak down test both checked out okay.Car still feels fast but will stall when brought back to a idle.Any ideas on what is going on with my car would be appreciated.

FastestBusaAround

Possible you're not vented properly at the crankcase? That's what it sounds like to me. Check your crankcase pressure; it should be zero. I blew 2 rear main's due to poor venting before I managed to fix that issue.