Hi everyone, ben having an issue with my edge lately, gonna take it to my mechanic soon. Everytime i fill my gas tank up shortly after leaving the gas pump and coming up to a red light my rpms kinda stutter down and car seems to recover shortly after, i had this issue before and changed my spark plugs because this triggered the check engine light to come on and it said misfire in cylinder 3. But this only happens after putting gas into the vehicle. Long story short~~~can a bad purge valve cause the spark plug damage or misfires??? Im at a loss because It only misfires after a gas fill up.