Looking for Hyundai Sonata TSB #99-30-002 Diagnostic Procedure: Hard-To-Fill Fuel Tank. All versions I have found did not contain any diagrams or graphics
No OBD codes. Have isolated evap canister from rest of system by removing 1/2" hose that goes to Neck (liquid-vapor separator), made no difference in gassing up. Also, checked Evap Canister manually, no charcoal pellets in any hoses, was able to blow air with little back pressure through canister, close valve and air filter. Suspect, fuel cut valve or vent valve. Not sure of other system components.
Cars & Trucks - Hyundai - Sonata
Answers & Comments
Top of fuel tank has fuel roll over valve or called vent valve. this is problem with hard to fill issue