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When putting gas in the tank, it backs up the fill tube and kicks off the pump. on 2002 Hyundai Elantra

This problem is getting worse with each fill up. I now have to run the pump at the slowest possible rate and it still backs up and kicks off. Is it clogged or a venting issue or some filter that needs replacing?

Asked by for the 2002 Hyundai Elantra
its a venting issue,poss evap or vent hose causing problem. seek diag from a good mech
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its a venting issue,poss evap or vent hose causing problem. seek diag from a good mech