hi, i have a 1976 280z with an automatic trans. i need help. i bought this car and the owner told me it used to run but it stop runing due to bad feul pump. i went ahead and changed the feul pump. i tried to start the car but car was just cranking but dont start. i went and add more gas. the same problem it crank but dont start. i used a jumper on the battery but same symptoms. i put gas in the intake manifold and the car started. i went on diagnosis the car. i thougth of feul pressure. i took one of the injector out and i tried to start the car but the injector was not pumping /spraying gas out. i went ahead and disconnect the feul line. i asked someone to turn the car on and feul pressure build up. when i tried to release it, gas was spraying everywhere. there is power going to all injectors. pls help me fix this car and have it running. i have change the feul pump. feul filter, starter and a new battery. help pls. thanks

Sounds electrical, if you are getting fuel to the injectors, but they aren't pulsing.

Download the 280Z EFI pdf and have a read.

http://www.atlanticz.ca/zclub/techtips/efisystem/280zfuelinjectionbook.pdf