The car started failing last Monday. We were thinking of the possibility of when we disabled the security system (where you scan before turning on with the little device) might have caused the whole problem. The system had worn off and wouldn’t allow us to turn on the car but that was 6 months ago. But i doubt it. It may have to do with the communication between the pump and the computer. When we put the keys on the ON position, the pump does not make any sort of noise. We have to move around the sensors on the fuel pump or under the hood to hear the noise