anthony sushi

before i dont have problem when press on gas paddle , run so smooth and accelerate so fast no hear any sound , (i believe it run on electric ) now when i press on ga paddle , make a lot of sound , ev mode switch to engine mode, gas MPG dropped to 45 to 40.1 car still running ok, but make alot of sound on engine mode, when it back to electric mode no sound, when back to engie mode hear loud noise., Did anyone have this kind of problem? really appreciate any info