Hey guys and gals. any help would be appreciated. i have a 2012 kia optima ex, 125,000 miles. So it has been happening for a while now. when ever i fill up my gas tank all the way my car boggs while driving. Once the tank hits about half ways to 3/4 full it drives normal again. It boggs randomly while driving both highway and city. About a year ago i did have a new fuel pump installed at the dealer, 6 months ago this problem started happening. i did get a code which i dont remember off the top of my head but i had to replace my fuel cap and a evap sensor. The codes did go away but the issue is still happening. Any ideas? Thanks