Maintenance? Chech your spark plugs and if they're new check the gaps. Also verify your throttle body. Cleaning these has done for me a couple of times on few cars.
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Gotta Have It Green GT 2013 | Recaro | Brembo | Track | 3.73 Rear End | Boss 302 Intake Manifold -Dynatech Long Tube Headers - Magnaflow Full Exhaust & Tru X Pipe 3 - JLT Intake- SCT 91 Tune - BMR Pan Hard Bar - SR Performance Sway Bar Kit - Steeda Strut Bar - MGW Shifter Kit - Hankook RS3 275 Rear - Hawk HPS Brake Pads - Roush Front Lip & Roush Full Side Skirts