Check the vent tube and all lines to charcoal canister. The tank is not venting enough, that's why you can't fill it fast. The canister also might be full of gas.
2014 Rubicon, Mopar 2" lift w/Fox shox, RE Geo brackets, Teraflex monster front track bar 285-70-17 Duratracs on 17x8.5 Level 8 Punch wheels. RBZ and PRS+ mod, Bestop High Rock rack and High Access front bumper, Smittybilt Gen2 comp winch, Bestop soft doors, Cobra 75WX.
2015 Jeep Renegade Trailhawk