As you are aware of by now, the vapor canister purge valve is responsible for redirecting gasoline vapors back in the engine. This is preventing poisonous hydrocarbons from being emitted out of your tailpipe. It took a lot less than 15 min to install and it fixed both equally issues. http://andreshkjil.fireblogz.com/17915347/the-5-second-trick-for-purge-valve