When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
With the key "on" or the engine running, pull the vacuum line off, and if there's and gas leaking (or smell of gas {i think}), it needs to be replaced.
Have you checked the breather tube? Its a vacuum line that runs from the intake to the back of the motor.. mine was off at the motor, and it caused a bad idle.. could be worth a check.