Check to make sure that the boot from your AFM to turbo is not split. (assuming you are using stock ZXT setup)
When I had my T3/T4 installed (living in a condo - no place to work), the Z shop that did the work had to trim the boot. When they did it, they cut the spring inside the boot that keeps it from collapsing too far back, and I developed a split in that area - on the underside where it wasn't obvious!
A trip to a Z yard got another for $25, and I did it the correct way - no problems now.