On that model there is no reserve in the fuel tank..and so the computer is set to stop you from increasing your rpms so that you can conserve the fuel that you have left..It does the when it hits 1/8 of a tank..This is caused by the float on in the gas tank...they are bad for getting water logged and staying down,then your puter thinks 1/8 tank and limits your rpm to get you home slow...Your float must be sticking here and there.