The pump needs to be activated by turning the ignition key on, off, on, off a few seconds to pressurize the fuel line (you should be hearing a buzzing sound) and when done THEN you can turn the key all the way to start the car. A broken wire to the fuel pump or a bad pump will cause the car not to start. Make aure your pressure regulartor is good, too much fuel pressure can cause the pump to wear out fast. A mechanic at a garage can chrck your fuel pressure if he / she has the tools