Well since this is 05-09 tech, a sticky gas pedal is unrelated to the butterflies on the TB since the S197 throttle control is electronic (there is no cable connection between the TB and gas pedal). Unless I missed what kind of car you have.
FRPP HotRods Cams / American Racing Headers Long Tubes with catted X / Stang-Hi dyno tune
Saleen wheels / Steeda CAI / Corsa Xtremes, K Springs, Koni STR.Ts, UMI lca relo. Brackets/r lwr ctrl arms UMI adj. panhard bar / Camber plates / SR Strut Tower Brace.