On my 300zx, i created a kill switch by cutting the wire going to the fuel pump relay, then mounting a switch in a discrete location in the car, when the switch was off, the car would start and then stutter to a stop, no fuel hehe, very effective anti theft device, just an extra protection type thing. Anyone have info on where the fuel pump wires are, on the 300zx they were next to the clutch, on the left of your heel.
Andre

 

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Andre,

I think that no one is responding due to the built-in immobilizer system that prohibits the fuel pump from working unless the original (ECU programmed/matched) key is inserted in the ignition...

If you really must know, I will look in my Helm Electrical troubleshooting book...

 

Theives can always find a way around that. Kill switch would just be another safety precaaution.