75 280z problem any advice?

[The moist shaft]

I bought the car recently and replaced the coil, plugs, wires, battery terminals. The car is getting spark and fuel. If i hold the key on the start position(where the starter is turning the motor) it will rev up and seem to run. But whenever i release the key and let it go to the run position, the car shuts off. I have no idea what it can be, mabye the ignition or something electrical. Anyones advice will be greatley appreciated.

[hr369]

first thing i'de look at is fuel pressure. sounds like you're fuel pump is turning off

[SteveJ]

Look at the Electronic Fuel Injection Relay. That is where the power for the fuel pump comes from. Go to http://www.xenons30.com/reference and download the 75 FSM (2 links on the page). Go to the following link to get a copy of the wiring diagram: http://www.atlanticz.ca/zclub/techtips/electrical.htm.

[The moist shaft]

i dont think it is the fuel pump due to the fact that if i hold the key turned i can hit the gas and it will rev up just fine, just wont stay running after i let the key go.

[The moist shaft]

i dont think it is the fuel pump due to the fact that if i hold the key turned i can hit the gas and it will rev up just fine, just wont stay running after i let the key go

[SteveJ]

i dont think it is the fuel pump due to the fact that if i hold the key turned i can hit the gas and it will rev up just fine, just wont stay running after i let the key go

Your fuel pump is losing power when the ignition switch goes from Start to Run.

When you start your car, the coil on the start side of the Engine Fuel Injection Relay is energized, providing power to the fuel pump. When the key goes to the Run position, another coil on the same relay is energized provided that the relay also receives the signal that the engine is running.

All you have to do is read through the references I listed earlier, and you'll be on track to solve your problem.

[The moist shaft]

how do i go about checking if the relay is working proberly?

[SteveJ]

how do i go about checking if the relay is working proberly?

All you have to do is read through the references I listed earlier, and you'll be on track to solve your problem.

Specifically, focus on the EF section of the FSM.

[The moist shaft]

fixed it. Person that owned it before me had the ignition wired up wrong. thanks for all your help.