have a code 27 bruning fuel badwe

What is your question?

well i have had a check engine like 3days or so.i did a key on key off because auto zone unit could not bring up any codes at all.well the key on an off gave me a code [27]. had a friend well he said something about num [1]injector then said that i had a bad spark plug or wires. i need to know what's the problem with my car. can anyone help me?