How do you fix a Sticky gas pedal?

Lubricate

Change cable

Replace throttle body

before replacing throttle try cleaning it out real good as a bad enough carbon build up can cause it to stick.

It would help to know what kind of car. If the car has fuel injection, you probably need to clean the throttle plate. This is done by removing the throttle body and spraing the inside of the the throttle with throttle plate cleaner. Buy a bottle and read the directions on the can. This will also help improve your performance and gas mileage.