I have not taken the plugs or coils out again but double checked my connections and everything seems seated correctly. I was concerned that the connection at the air box wasn't tight or flush but no change.
Seems weird that a boost leak would develop after plug replacement but I did unbolt the motor mounts and lift ~1" for clearance. Am I right in assuming that I would probably get a miss fire code at times other than WOT if it was a coil or plug problem? Aren't the coils firing at the same rate at 5k regardless if the throttle is depressed?
I did check the gaps and the coils looked fine. No noticeable difference other than some mild white corrosion on the bolt threads only.
I have added another data log with boost, target boost, and boost error. This is with the Stage 1 again so boost targets are higher. The stock tune was realtime and it defaulted to this after an ecu reset. I am not hitting boost targets in the 4K+ and I notice the hesitation most in the mid rpm range. I don't know how to tell from a data log if the ECU is pulling boost for safety or if I am leaking as you all stated. My wastegate duty cycle decreases slightly at 4406 RPM which leads me to believe that it is trying to build more boost but can't? The wastegate duty cycle increase with RPM is consistent with the programmed boost taper?
If the next step is to test for boost leaks, where do you recommend placing the tester? Do I have to start at the turbo inlet or can I place it at the airbox coupling?
If I give up and take it to the mechanic, do you recommend a "specialist" or to take it to my regular mechanic? I assume that most mechanics can handle a turbo in this day and age? I'd rather not take it to the dealer will if I have to. Thanks again for the advice. datalog2.csv