Hi, all. I have a 2004 Hyundai Sonata GLS (V6) and have a problem. After fueling gas, it is hard to start engine. So I had a check up at the local Hyundai service center, and the mechanic said that I need to change purge control valve. They ask me to pay ~ $250. So I want to change it by myself. Do you have any idea how I can change the valve?