OP- I may be able to help you out, but I'm in the East Bay, so we'd have to schedule a time to meet and take a look at your car.
If you don't have a scanmaster, I can bring one to use...I actually just bought Marcus's since I needed it on a local customer's car.
When you say the car "hesitates" what exactly do you mean? Does it make any noises while you're accelerating? Can you move the wastegate puck on the downpipe easily?
I'm down here until Monday, but if you're free I could maybe stay another day or two and come by your place to take a look. If anything we could rule out some potential issues. I could bring the scanmaster to see if you're throwing any codes, and a new wastegate actuator and aftermarket boost controller w/ some new vacuum hoses.
I have almost all my tools with me, so if anything needed to be worked on, now would be the perfect time.
Hit me up tonight or tomorrow whenever. I'll be working on a local dude's car installing a wideband, boost controller/gauge, and then tuning the car tomorrow as well. My number is 707 362 6030.
-Tyler
Gee, thanks Marcus...