TBird throttle sticks

Help me please, my wife's new to her 2003 TBird with 18K miles, only 2 months old for her has developed a sticking throttle. When backing off the accelerator and applying the brake for a stop the engine continues to run on and it's all she or I can do to hold the brakes to keep from running the stop. It's happened 4 times now with allways the same criteria.
We're looking at shop time but I'd like to avoid it if possible. Anyone out there heard of this?
Regards,
Steve Paul
Nashville, IN

Clean the throttle body.That model may have an electronic throttle connection, but if not make sure the cable is clean and in good working order.