I have the 2.5 pulley from VMP and a tune from BAMA. My car is perfectly fine.
It sounds like u r already on the right path. I would check my cai and make sure it is tight. I immediately wondered about a tb as well.
Tint, louvers, Shelby brake light cover, sequentials, brake vent ring delete, Shorty antenna, JLT cold air intake, BAMA tune, VMP 2.5 S/C pulley, Ford racing shifter, MRT OR-H, SLP loudmouths, BMR adj PHB, BMR LCA, Eibach Pro-Kit, cobra jet big oval TB.