@TheOtherNick - thanks for the reply. I'd really like to tackle this on my own. Besides, I live in rural Nova Scotia so the nearest dealer is quite a distance away.
Aside from Gas cap causing the issue, what would be the 2nd most common item to check? I've done some research and hear things like evap purge solenoid or valve but I'm not exactly sure what it looks like or where it is located. Any assistance would be great.