whistling noise on 2001 Hyundai XG300

whistling noise occur when i step on the gas pedal, also my rpms dont go very high. theres hesitation with power. email

Asked by for the 2001 Hyundai XG300
You may have a plugged Catalytic Converter. Do you ever get a check engine light blinking or staying on? If so, get those codes read, that will be a big help.

here are some shops: