so after having my greddy tt installed, i noticed the car wont hold a steady boost. wastegate was set at 6psi, now right after the install, it goes to 10psi. on top of that, in fifth gear, it bogs once it goes passed 6psi. wtf? i didnt think the tt would have any effect on boost settings.
it was fine the sencond before we put in the tt, but right after, it starts spiking.

I don't see how the two could be related. I just put my Greddy Full Auto Timer in last night and it has no relationship with my Greddy Boost Controller.

One constant 12v, two ignition 12v, a clean ground, vss wire and eBrake. NONE of these should affect your boost controller, unless you tampered with something unknowingly.