2000 Pontiac fuel emission

My suggestion is to take your car to checker or Autozone have them do a computer code check, because what the Mechanic said make no sense at all, because there is no part called the vapor lock, that is an old problem that cars in the pre- 80's had problems with, and they have since fixed it. Most likely the problem is something simple like a o2 sensor and yes you can fix most of the fuel emmisions your self. The guys at autozone can show you what part to change and can show you where to find it and how to do it. Hope this helps