1985 928s puel pump not working no power getting to the pump so i wont to no which relay and fuse need to be changed but have no wirring diagram to see whitch one to check and there are so many fuese nad relays dont no were to start can anyone sedn me a copy of wire diagram,fuse layout and relay layout THANKS this would be much appreciated

To start with not getting gas so you changed spark ????what spark.
Go to fuse box find pump relay and get it tested if ok then check feed at relay if ok go to pump check power with test light first and then check power to fuse box.[ if you havent already ].

No FPR fitted.
Works via fuel pump module.
Module powered from fuse 81 on diagram of fascia fuse box. This fuse gets its feed from the ignition relay.

Fuel pump will only have power for 2 seconds unless engine is cranking or running. Most common cause for ur problem is a broken dowel pin in the cam gear causing the timing to be out just enough to shut itdown

I can't imagine how that would be possible unless something in the fuse box or wiring harness was damaged while you were working on the axle.
I would check the fuel pump relay for power and see if it is sending voltage to the pump. You may need a book to get the wiring diagram for the circuit.

If the passkey system were not working the engine should not crank and the fuel injectors would be dead. The security light would also stay on.
The fuel pump relay gets battery voltage and also voltage from the key switch. The computer grounds the relay to power the pump.
The crank sensor does not come into play until the engine is cranking and it supplies a signal for the ignition and injector pulse.
Are you not getting power from the key switch to the relay, or from the battery side to the relay ?

The Vats system is the cars anti theft security. If the ignition does not read that chip in the key, the starter will not turn over and the injectors might not work. I dont think the Vats is effecting your problem, but here is a link about the security. http://vatspasslockpasskeysecurityhelp.yolasite.com/

You need to check the headlight switch,but there should be a fuse for the instrument lights that can be found in the owners manual.The radio may be the problem if the fuse blows again,unplug it to confirm.

The blue wire changes to Blue/White. It gets power from the Fuel Pump Relay. Fuse number 11 is the power source. The relay is up under the dash panel, blue connector

have u checked the fuel pump cut off switch?
it is in the truck on the drivers side.

chck out this site, it has free diagrams etc in pdf format:-
http://www.onlinefreeebooks.net/automotive-machinery-power-equipment-ebooks/porsche/wiring-diagram-porsche-type-928-s-model-89-pdf.html

Your problem can also be with the Bosch ECU, these are prone to failing and also control the fuel pump, they can however be rebuilt.