my car will turn over but wont start i have replced the fuel filter, pump and relays and still wont fire they said it might be the security system but the light dosent stay on it flashes like noremal when i turn the key to on i cant here the fuel pump turn on but if i keep turning the key off and on eventually the fuel pump kicks on and it starts but as soon as i turn it off the car wont start again i have replaced alot of stuff on this car the next thing will be the ignition switch unless some one can give me somthing else to try??????