I have a 95 civic hatch with a D16z6. When my car is idling i can hear a humming noise from my fuel pump. I am assuming it is the same when car is moving but since the motor is loud, i cant hear the humming. i was wondering if this means that the pump is going bad. i am using regular octane gas which is something like 87, i think. I did a search but couldnt find anything.