I have a 2004 KIA optima and about a year ago I started having a problem filling up my gas tank. When I go to fill it up, the fuel pump nozzle shuts off after I put in about half of a gallon. I have been struggling to find the cause. I have replaced the following, but the problem persist. Replaced: Charcoal Canister Vent solenoid valve
CORRECTION: Replaced Charcoal Canister and Vent solenoid valve.
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